COUNCIL OF THE EUROPEAN UNION
EN
Council conclusions on the TSE Road Map 2
A Strategy paper on Transmissible Spongiform Encephalopathies for 2010 - 2015
3050th AGRICULTURE and FISHERIES Council meeting
Brussels, 29 November 2010
The Council adopted the following conclusions:
"Council Conclusions on the Communication from the Commission to the European Parliament and the Council
RECALLING
- Council Resolution of December 2000 on the use of the precautionary principle1
- Communication from the Commission "TSE Road map" of July 20052
- Council progress report on the "TSE Road map" of December 20053 ;
WHEREAS
i. The EU has adopted a comprehensive series of stringent measures against risks stemming from the family of diseases called the Transmissible Spongiform Encephalopathies (TSEs) which call for specific attention due to their capacity of cross-species transmission and the ability of certain strains to cause fatal disease in humans;
ii. Centered around Regulation (EC) No 999/2001 of the European Parliament and of the Council of 22 May 2001 laying down rules for the prevention, control and eradication of certain transmissible spongifor encephalopathies4, these measures have resulted in a significant reduction of TSE incidence. At the same time, the impact of Bovine Spongiform Encephalopathy (BSE) on human health appears to be more limited than initially feared;
1 Doc. 14328/00.
2 11408/05 - COM(2005) 322 final.
3 15537/05 + ADD 1.
4 Regulation (EC) No 999/2001 of the European Parliament and of the Council of 22 May 2001 laying down the rules for the prevention, control and eradication of certain transmissible spongiform encephalopathies. OJ L 147, 31.5.2001, p. 1.
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iii. On 15 July 2005, taking stock of the epidemiological development and increased scientific knowledge, the Commission had submitted to the European Parliament and the Council a reflection paper called "TSE Road map";
iv. This first "Road map" was thoroughly examined in a progress report to Council;
v. On 16 July 2010, the Commission submitted to the European Parliament and the Council the
"TSE Road map 2". Like the first Road map five years ago, this document aims to outline future possible amendments allowing a review of the measures to align them with the situation where the EU is finally on the last pathway to eradicate BSE within the European cattle population;
vi. Under the Belgian Presidency, the Council Working Party of Veterinary Experts (Public
Health) discussed the Commission Communication and identified priority areas for further work5.
THE COUNCIL OF THE EUROPEAN UNION
Regarding the general approach
1. WELCOMES strongly the Commission's initiative to present a new "TSE Road map" five years after the previous one as a basis for discussion of future alignment of the existing measures.
2. NOTES that the majority of actions envisaged in the first "TSE Road map" of 2005 have been achieved.
3. CONSIDERS that the implementation of the current TSE legislation has been effective towards preventing, controlling and eradicating these diseases.
4. CONFIRMS that the goal for the coming years is to continue the review of the measures, aiming at their proportionality and cost-effectiveness, while assuring a high level of food safety. This review should be primarily driven by scientific advice and technical issues related to the control and enforcement of the new measures, and the inter-relationship between the various TSE surveillance and control measures should be fully taken into account.
5. CALLS for any amendments to the TSE rules to be taken following a stepwise approach based on an appropriate assessment of the possible risks for human and animal health and taking into account existing scientific evidence and innovation.
6. REITERATES in this context the key objectives of consumer protection and control and eradication of TSEs, which call for vigilance in order to continue to monitor the situation also in case of a potential re-emergence of BSE or emergence of new TSE agents in ruminant populations.
7. RECALLS that the scientific advice provided by the European Food Safety Authority (EFSA) should continue to play a crucial role to consider future policy options.
5 Doc. 13888/10.
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8. CONSIDERS it to be of paramount importance to continue research in those areas where information is lacking or gaps exist which do not allow firm decisions to be taken.
9. EMPHASIZES the importance of a strong and credible international framework, in particular within the context of the World Animal Health Organisation (OIE), to ensure that trade can take place under safe and fair conditions. The EU must take the lead in international standard setting bodies to promote EU standards and policies, and align its legislation with international standards as far as possible, while maintaining a high level of sanitary protection.
Regarding specific policy options
10. SUPPORTS the Commission's goal to continue to adapt the BSE monitoring system for bovine animals with a view to its better targeting, and CONSIDERS that progress should be made on this when the necessary supportive scientific opinion is received.
11. AGREES that such adaptations should be risk based and aimed at making the EU surveillance system more focused, efficient and cost-effective for all Member States. At the same time, these adaptations will have to be compatible with OIE standards and fully ensure the EU's continuing capacity to monitor the epidemiological development, including the detection of a possible re-emergence of BSE and emergence of new TSEs.
12. RECOGNISES the fundamental importance of the ban on using processed animal protein (PAP) in feed for farmed animals in preventing the circulation of BSE via the feed chain and thus playing the key role in the reduction of the incidence of this disease in the bovine population.
13. IS AWARE of the important ethical and environmental considerations in relation to the use of PAPs as ingredients for feed for farmed animals.
14. CONSIDERS it a prerequisite of any possible re-introduction of the use of non-ruminant PAPs to feed for other non-ruminant species that effective and validated tests are available to distinguish between PAPs originating from different species and that there has been a careful analysis of the risks of relaxation, regarding animal and public health.
15. TAKES NOTE of other priorities stated by Member States at the Working Party of Veterinary Experts (Public Health), including:
- Further revision of the list/age limit for Specified Risk Materials (SRMs)
- Scrapie eradication, in particular to redefine the objectives of the scrapie measures
- Cohort culling in bovine animals
- Measures regarding atypical scrapie and atypical BSE.
With regard to these considerations,
THE COUNCIL OF THE EUROPEAN UNION
16. EXPRESSES its support for the list of main strategic goals and policy options outlined in the Commission Communication and INVITES the Commission to take also the priorities identified at the Council Working Party into account when submitting future proposals.
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17. EMPHASIZES that the justification for any changes must be carefully and effectively communicated to consumers, affected industries and third country trading partners to ensure that confidence in EU measures is maintained.
18. AGREES that, in setting the EU's future strategy, it is essential not to lose sight of other threats to animal and public health.
19. CALLS UPON the Commission also to examine in this context all evidence which might help setting future priorities among diseases in particular to their impact in terms of public and animal health."
http://www.consilium.europa.eu//uedocs/cms_data/docs/pressdata/en/agricult/118074.pdf
Saturday, July 17, 2010
TSE Road map 2 A Strategy paper on TSE, a road to no where
Brussels, 16.7.2010 COM(2010)384 final COMMUNICATION FROM THE COMMISSION TO THE EUROPEAN PARLIAMENT AND THE COUNCIL
http://transmissiblespongiformencephalopathy.blogspot.com/2010/07/tse-road-map-2-strategy-paper-on-tse.html
The most recent assessments (and reassessments) were published in June 2005 (Table I; 1, and included the categorisation of Canada, the USA, and Mexico as GBR III. Although only Canada and the USA have reported cases, the historically open system of trade in North America suggests that it is likely that BSE is present also in Mexico.
http://www.oie.int/boutique/extrait/06heim937950.pdf
GOC RELEASES CONSULTATION DOCUMENT ON NEW BSE IMPORT POLICY IN LINE WITH OIE: The Canadian Food Inspection Agency (CFIA) is inviting public comment on a proposed new Canadian Import Policy to prevent bovine spongiform encephalopathy (BSE) in bovine animals and their products. The proposed policy would bring Canada’s approach in line with new World Organization for Animal Health (OIE) standards as well as the proposed North American import standard announced on March 29, 2005. It is based on the recognition that international knowledge of bovine spongiform encephalopathy (BSE) and me asures to mitigate its transmission have advanced significantly since Canada’s existing import policy for controlling BSE was established in 1997. The new policy would be less restrictive than the current one. Canada’s current policy permits the importation of live ruminants including, cattle, sheep and goats, and products derived from them, only after the exporting country has been officially recognized as BSE-free. Current science recognizes that the “ BSE-free” requirement is unnecessarily restrictive. The draft policy is based on a proposed new OIE three-tier system for classifying bovine-trading countries based on their BSE risk management regimes. In all cases, exporting countries would also have to continue to meet other non-BSE food safety and animal health
GAIN Report - CA5038 Page 3 of 4
UNCLASSIFIED USDA Foreign Agricultural Service requirements before becoming eligible to ship to Canada under any of the new BSE risk categories. A consultation period ending on July 22, 2005 is being provided to allow interested parties the opportunity to provide comments on the draft policy. Notice of this consultation is being published in the Canada Gazette.
http://www.fas.usda.gov/gainfiles/200505/146129759.pdf
SNIP...
Dr. DeHaven has often represented the United States in delicate and often difficult trade negotiations. As the former U.S. Chief Veterinary Officer and U.S. delegate to the OIE, he routinely used his diplomatic skills as he facilitated agreements that are science-based. He was instrumental in building consensus that led to the current OIE BSE chapter
SNIP...
http://www.usaha.org/meetings/2007/2007_USAHA_Proceedings.pdf
“The U.S. has lower sanitary and phyto-sanitary standards (SPS) for imports than many other countries, especially those concerning bovine spongiform encephalopathy (BSE). These low standards have made the U.S. a dumping ground for beef from the countries that have experienced BSE problems. Food Safety and SPS issues continue to be problematic for our industry, as some countries comply with OIE standards, while others ignore them either for cultural reasons, or too often use them as trade barriers. The USITC October 7, 2008 release reported, ‘U.S. beef processors and beef cattle ranchers lose billions of dollars in export opportunities each year because of animal health and food safety measures in other countries that are inconsistent with international standards and vary by country.
http://www.cattlenetwork.com/USCA-Testifies--Before-USITC/2010-03-03/Article_Latest_News.aspx?oid=996238&fid=CN-LATEST_NEWS_
Scientific Report of the European Food Safety Authority on the Assessment of the Geographical BSE Risk (GBR) of the USA Question number: EFSA-Q-2003-083
Adopted: 1 July 2004 Summary (0.1Mb)
Report (0.2Mb)
Summary
The European Food Safety Authority and its Scientific Expert Working Group on the Assessment of the Geographical Bovine Spongiform Encephalopathy (BSE) Risk (GBR) were asked by the European Commission (EC) to provide an up-to-date scientific report on the GBR in the United States of America, i.e. the likelihood of the presence of one or more cattle being infected with BSE, pre-clinically as well as clinically, in USA. This scientific report addresses the GBR of USA as assessed in 2004 based on data covering the period 1980-2003.
The BSE agent was probably imported into USA and could have reached domestic cattle in the middle of the eighties. These cattle imported in the mid eighties could have been rendered in the late eighties and therefore led to an internal challenge in the early nineties. It is possible that imported meat and bone meal (MBM) into the USA reached domestic cattle and leads to an internal challenge in the early nineties.
A processing risk developed in the late 80s/early 90s when cattle imports from BSE risk countries were slaughtered or died and were processed (partly) into feed, together with some imports of MBM. This risk continued to exist, and grew significantly in the mid 90’s when domestic cattle, infected by imported MBM, reached processing. Given the low stability of the system, the risk increased over the years with continued imports of cattle and MBM from BSE risk countries.
EFSA concludes that the current GBR level of USA is III, i.e. it is likely but not confirmed that domestic cattle are (clinically or pre-clinically) infected with the BSE-agent. As long as there are no significant changes in rendering or feeding, the stability remains extremely/very unstable. Thus, the probability of cattle to be (pre-clinically or clinically) infected with the BSE-agent persistently increases.
http://www.efsa.europa.eu/EFSA/efsa_locale-1178620753812_1211902594180.htm
Monday, November 23, 2009
BSE GBR RISK ASSESSMENTS UPDATE NOVEMBER 23, 2009 COMMISSION OF THE EUROPEAN COMMUNITIES AND O.I.E.
http://docket-aphis-2006-0041.blogspot.com/2009/11/bse-gbr-risk-assessments-update.html
Docket APHIS-2006-0026 Docket Title Bovine Spongiform Encephalopathy; Animal Identification and Importation of Commodities Docket Type Rulemaking Document APHIS-2006-0026-0001 Document Title Bovine Spongiform Encephalopathy; Minimal-Risk Regions, Identification of Ruminants and Processing and Importation of Commodities Public Submission APHIS-2006-0026-0012 Public Submission Title Comment from Terry S Singletary
http://www.regulations.gov/fdmspublic/component/main?main=DocumentDetail&o=09000064801e47e1
Docket APHIS-2006-0041 Docket Title Bovine Spongiform Encephalopathy; Minimal-Risk Regions; Importation of Live Bovines and Products Derived from Bovines Commodities Docket Type Rulemaking Document APHIS-2006-0041-0001 Document Title Bovine Spongiform Encephalopathy; Minimal-Risk Regions; Importation of Live Bovines and Products Derived From Bovines Public Submission APHIS-2006-0041-0028 Public Submission Title Comment from Terry S Singletary
Comment 2006-2007 USA AND OIE POISONING GLOBE WITH BSE MRR POLICY
THE USA is in a most unique situation, one of unknown circumstances with human and animal TSE. THE USA has the most documented TSE in different species to date, with substrains growing in those species (BSE/BASE in cattle and CWD in deer and elk, there is evidence here with different strains), and we know that sheep scrapie has over 20 strains of the typical scrapie with atypical scrapie documented and also BSE is very likely to have passed to sheep. all of which have been rendered and fed back to animals for human and animal consumption, a frightening scenario. WE do not know the outcome, and to play with human life around the globe with the very likely TSE tainted products from the USA, in my opinion is like playing Russian roulette, of long duration, with potential long and enduring consequences, of which once done, cannot be undone. These are the facts as I have come to know through daily and extensive research of TSE over 9 years, since 12/14/97. I do not pretend to have all the answers, but i do know to continue to believe in the ukbsenvcjd only theory of transmission to humans of only this one strain from only this one TSE from only this one part of the globe, will only lead to further failures, and needless exposure to humans from all strains of TSE, and possibly many more needless deaths from TSE via a multitude of proven routes and sources via many studies with primates and rodents and other species.
MY personal belief, since you ask, is that not only the Canadian border, but the USA border, and the Mexican border should be sealed up tighter than a drum for exporting there TSE tainted products, until a validated, 100% sensitive test is available, and all animals for human and animal consumption are tested. all we are doing is the exact same thing the UK did with there mad cow poisoning when they exported it all over the globe, all the while knowing what they were doing. this BSE MRR policy is nothing more than a legal tool to do just exactly what the UK did. ...
http://www.regulations.gov/fdmspublic/component/main?main=DocumentDetail&o=09000064801f8151
Docket APHIS-2006-0041 Docket Title Bovine Spongiform Encephalopathy; Minimal-Risk Regions; Importation of Live Bovines and Products Derived from Bovines Commodities Docket Type Rulemaking Document APHIS-2006-0041-0001 Document Title Bovine Spongiform Encephalopathy; Minimal-Risk Regions; Importation of Live Bovines and Products Derived From Bovines Public Submission APHIS-2006-0041-0028.1 Public Submission Title Attachment to Singletary comment
January 28, 2007
Greetings APHIS,
I would kindly like to submit the following to ;
BSE; MRR; IMPORTATION OF LIVE BOVINES AND PRODUCTS DERIVED FROM BOVINES [Docket No. APHIS-2006-0041] RIN 0579-AC01
http://www.regulations.gov/fdmspublic/ContentViewer?objectId=09000064801f8152&disposition=attachment&contentType=msw8
Owner and Corporation Plead Guilty to Defrauding Bovine Spongiform Encephalopathy (BSE) Surveillance Program
An Arizona meat processing company and its owner pled guilty in February 2007 to charges of theft of Government funds, mail fraud, and wire fraud. The owner and his company defrauded the BSE Surveillance Program when they falsified BSE Surveillance Data Collection Forms and then submitted payment requests to USDA for the services. In addition to the targeted sample population (those cattle that were more than 30 months old or had other risk factors for BSE), the owner submitted to USDA, or caused to be submitted, BSE obex (brain stem) samples from healthy USDA-inspected cattle. As a result, the owner fraudulently received approximately $390,000. Sentencing is scheduled for May 2007.
snip...
4 USDA OIG SEMIANNUAL REPORT TO CONGRESS FY 2007 1st Half
http://www.usda.gov/oig/webdocs/sarc070619.pdf
Seven main threats for the future linked to prions
The NeuroPrion network has identified seven main threats for the future linked to prions.
First threat
The TSE road map defining the evolution of European policy for protection against prion diseases is based on a certain numbers of hypotheses some of which may turn out to be erroneous. In particular, a form of BSE (called atypical Bovine Spongiform Encephalopathy), recently identified by systematic testing in aged cattle without clinical signs, may be the origin of classical BSE and thus potentially constitute a reservoir, which may be impossible to eradicate if a sporadic origin is confirmed.
*** Also, a link is suspected between atypical BSE and some apparently sporadic cases of Creutzfeldt-Jakob disease in humans. These atypical BSE cases constitute an unforeseen first threat that could sharply modify the European approach to prion diseases.
Second threat
In small ruminants, a new atypical form of scrapie currently represents up to 50% of detected cases and even involves sheep selected for resistance to classical scrapie. The consequences for animal and human health are still unknown and there may be a potential connection with atypical BSE. These atypical scrapie cases constitute a second threat not envisioned previously which could deeply modify the European approach to prion diseases.
Third threat
The species barrier between human and cattle might be weaker than previously expected and the risk of transmission of prion diseases between different species has been notoriously unpredictable. The emergence of new atypical strains in cattle and sheep together with the spread of chronic wasting disease in cervids renders the understanding of the species barrier critical. This constitutes a third threat not properly envisioned previously that could deeply modify the European approach to prion diseases.
Fourth threat
Prion infectivity has now been detected in blood, urine and milk and this has potential consequences on risk assessments for the environment and food as well as for contamination of surfaces including medical instruments. Furthermore the procedures recommended for decontamination of MBM (Meat and Bone Meal), which are based on older methodologies not designed for this purpose, have turned out to be of very limited efficacy and compromise current policies concerning the reuse of these high value protein supplements (cross-contamination of feed circuits are difficult to control). It should be noted that the destruction or very limited use of MBM is estimated to still cost 1 billion euros per year to the European economy,
whereas other countries, including the US,
Brazil, and Argentine do not have these constraints.
However, many uncertainties remain concerning the guarantees that can be reasonably provided for food and feed safety and scientific knowledge about the causative agents (prions) will continue to evolve. This decontamination and environmental issue is a fourth threat that could modify deeply the European approach to prion diseases.
Fifth threat The precise nature of prions remains elusive. Very recent data indicate that abnormal prion protein (PrPTSE) can be generated from the brains of normal animals, and under some conditions (including contaminated waste water) PrPTSE can be destroyed whereas the BSE infectious titre remains almost unchanged, a finding that underlines the possibility of having BSE without any detectable diagnostic marker. These are just two areas of our incomplete knowledge of the fundamental biology of prions which constitute a fifth threat to the European approach to prion diseases.
Sixth threat The absence of common methods and standardisation in the evaluation of multiple in vivo models with different prion strains and different transgenic mice expressing PrP from different species (different genotypes of cattle, sheep, cervids, etc) renders a complete and comprehensive analysis of all the data generated by the different scientific groups almost impossible. This deeply impairs risk assessment. Moreover, the possibility of generating PrPTSE de novo with new powerful techniques has raised serious questions about their appropriateness for use as blood screening tests. The confusion about an incorrect interpretation of positive results obtained by these methods constitutes a sixth threat to European approach to prion diseases.
Seventh Threat The detection of new or re-emerging prion diseases in animals or humans which could lead to a new crisis in consumer confidence over the relaxation of precautionary measures and surveillance programmes constitutes a seventh threat that could modify the European approach to prion diseases.
http://www.neuroprion.org/en/np-neuroprion.html
Thursday, August 12, 2010
Seven main threats for the future linked to prions
http://prionpathy.blogspot.com/2010/08/seven-main-threats-for-future-linked-to.html
http://prionpathy.blogspot.com/
ALABAMA MAD COW g-h-BSEalabama
In this study, we identified a novel mutation in the bovine prion protein gene (Prnp), called E211K, of a confirmed BSE positive cow from Alabama, United States of America. This mutation is identical to the E200K pathogenic mutation found in humans with a genetic form of CJD. This finding represents the first report of a confirmed case of BSE with a potential pathogenic mutation within the bovine Prnp gene. We hypothesize that the bovine Prnp E211K mutation most likely has caused BSE in "the approximately 10-year-old cow" carrying the E221K mutation.
http://www.plospathogens.org/article/info%3Adoi%2F10.1371%2Fjournal.ppat.1000156
http://www.plospathogens.org/article/fetchObjectAttachment.action?uri=info%3Adoi%2F10.1371%2Fjournal.ppat.1000156&representation=PDF
Saturday, August 14, 2010
BSE Case Associated with Prion Protein Gene Mutation (g-h-BSEalabama) and VPSPr PRIONPATHY
(see mad cow feed in COMMERCE IN ALABAMA...TSS)
http://prionpathy.blogspot.com/2010/08/bse-case-associated-with-prion-protein.html
Wednesday, July 28, 2010
re-Freedom of Information Act Project Number 3625-32000-086-05, Study of Atypical BSE UPDATE July 28, 2010
http://bse-atypical.blogspot.com/2010/07/re-freedom-of-information-act-project.html
P.9.21
Molecular characterization of BSE in Canada
Jianmin Yang1, Sandor Dudas2, Catherine Graham2, Markus Czub3, Tim McAllister1, Stefanie Czub1 1Agriculture and Agri-Food Canada Research Centre, Canada; 2National and OIE BSE Reference Laboratory, Canada; 3University of Calgary, Canada
Background: Three BSE types (classical and two atypical) have been identified on the basis of molecular characteristics of the misfolded protein associated with the disease. To date, each of these three types have been detected in Canadian cattle.
Objectives: This study was conducted to further characterize the 16 Canadian BSE cases based on the biochemical properties of there associated PrPres. Methods: Immuno-reactivity, molecular weight, glycoform profiles and relative proteinase K sensitivity of the PrPres from each of the 16 confirmed Canadian BSE cases was determined using modified Western blot analysis.
Results: Fourteen of the 16 Canadian BSE cases were C type, 1 was H type and 1 was L type. The Canadian H and L-type BSE cases exhibited size shifts and changes in glycosylation similar to other atypical BSE cases. PK digestion under mild and stringent conditions revealed a reduced protease resistance of the atypical cases compared to the C-type cases. N terminal- specific antibodies bound to PrPres from H type but not from C or L type. The C-terminal-specific antibodies resulted in a shift in the glycoform profile and detected a fourth band in the Canadian H-type BSE.
Discussion: The C, L and H type BSE cases in Canada exhibit molecular characteristics similar to those described for classical and atypical BSE cases from Europe and Japan. This supports the theory that the importation of BSE contaminated feedstuff is the source of C-type BSE in Canada. *It also suggests a similar cause or source for atypical BSE in these countries.
http://www.prion2009.com/sites/default/files/Prion2009_Book_of_Abstracts.pdf
Saturday, November 6, 2010
TAFS1 Position Paper on Position Paper on Relaxation of the Feed Ban in the EU Berne, 2010 TAFS
INTERNATIONAL FORUM FOR TRANSMISSIBLE ANIMAL DISEASES AND FOOD SAFETY a non-profit Swiss Foundation
http://madcowfeed.blogspot.com/2010/11/tafs1-position-paper-on-position-paper.html
Thursday, November 18, 2010
UNITED STATES OF AMERICA VS GALEN J. NIEHUES FAKED MAD COW FEED TEST ON 92 BSE INSPECTION REPORTS FOR APPROXIMATELY 100 CATTLE OPERATIONS
http://bse-atypical.blogspot.com/2010/11/united-states-of-america-vs-galen-j.html
Thursday, November 18, 2010
Increased susceptibility of human-PrP transgenic mice to bovine spongiform encephalopathy following passage in sheep
http://bse-atypical.blogspot.com/2010/11/increased-susceptibility-of-human-prp.html
Sunday, October 31, 2010
Scientific Opinion on the results of the EU survey for Chronic Wasting Disease (CWD) in cervids EFSA Panel on Biological Hazards (BIOHAZ) (October) 20
http://chronic-wasting-disease.blogspot.com/2010/10/scientific-opinion-on-results-of-eu.html
Tuesday, November 02, 2010
BSE - ATYPICAL LESION DISTRIBUTION (RBSE 92-21367) statutory (obex only) diagnostic criteria CVL 1992
http://bse-atypical.blogspot.com/2010/11/bse-atypical-lesion-distribution-rbse.html
Sunday, November 28, 2010
Variably protease-sensitive prionopathy in a PRNP codon 129 heterozygous UK patient with co-existing tau, a synuclein and AB pathology
http://prionopathy.blogspot.com/2010/11/variably-protease-sensitive-prionopathy.html
Atypical BSE in Cattle
BSE has been linked to the human disease variant Creutzfeldt Jakob Disease (vCJD). The known exposure pathways for humans contracting vCJD are through the consumption of beef and beef products contaminated by the BSE agent and through blood transfusions. However, recent scientific evidence suggests that the BSE agent may play a role in the development of other forms of human prion diseases as well. These studies suggest that classical type of BSE may cause type 2 sporadic CJD and that H-type atypical BSE is connected with a familial form of CJD.
To date the OIE/WAHO assumes that the human and animal health standards set out in the BSE chapter for classical BSE (C-Type) applies to all forms of BSE which include the H-type and L-type atypical forms. This assumption is scientifically not completely justified and accumulating evidence suggests that this may in fact not be the case. Molecular characterization and the spatial distribution pattern of histopathologic lesions and immunohistochemistry (IHC) signals are used to identify and characterize atypical BSE. Both the L-type and H-type atypical cases display significant differences in the conformation and spatial accumulation of the disease associated prion protein (PrPSc) in brains of afflicted cattle. Transmission studies in bovine transgenic and wild type mouse models support that the atypical BSE types might be unique strains because they have different incubation times and lesion profiles when compared to C-type BSE. When L-type BSE was inoculated into ovine transgenic mice and Syrian hamster the resulting molecular fingerprint had changed, either in the first or a subsequent passage, from L-type into C-type BSE. In addition, non-human primates are specifically susceptible for atypical BSE as demonstrated by an approximately 50% shortened incubation time for L-type BSE as compared to C-type. Considering the current scientific information available, it cannot be assumed that these different BSE types pose the same human health risks as C-type BSE or that these risks are mitigated by the same protective measures.
This study will contribute to a correct definition of specified risk material (SRM) in atypical BSE. The incumbent of this position will develop new and transfer existing, ultra-sensitive methods for the detection of atypical BSE in tissue of experimentally infected cattle.
Responsibilities include:
Driving research at the National and OIE BSE reference lab to ensure project milestones are met successfully. Contributing to the preparation of project progress reports. Directing technical staff working on the project. Communicating and discussing results, progress and future direction with project principle investigator(s). Communicating with collaborative project partners. Qualifications:
Successful completion of a PhD degree in an area focusing on or related to prion diseases. Extensive experience with molecular and/or morphologic techniques used in studying prion diseases and/or other protein misfolding disorders. Ability to think independently and contribute new ideas. Excellent written and oral communication skills. Ability to multitask, prioritize, and meet challenges in a timely manner. Proficiency with Microsoft Office, especially Word, PowerPoint and Excel. How to apply:
Please send your application and/or inquiry to: Dr. Stefanie Czub, DVM, Ph.D. Head, National and OIE BSE Reference Laboratory Canadian Food Inspection Agency Lethbridge Laboratory P.O. Box 640, Township Road 9-1 Lethbridge, AB, T1J 3Z4 Canada
phone: +1-403-382-5500 +1-403-382-5500 ext. 5549 email: stefanie.czub@inspection.gc.ca
Contact Info:
http://www.prionetcanada.ca/detail.aspx?menu=5&dt=293380&app=93&cat1=387&tp=20&lk=no&cat2
14th ICID International Scientific Exchange Brochure -
Final Abstract Number: ISE.114
Session: International Scientific Exchange
Transmissible Spongiform encephalopathy (TSE) animal and human TSE in North America
update October 2009
T. Singeltary
Bacliff, TX, USA
Background:
An update on atypical BSE and other TSE in North America. Please remember, the typical U.K. c-BSE, the atypical l-BSE (BASE), and h-BSE have all been documented in North America, along with the typical scrapie's, and atypical Nor-98 Scrapie, and to date, 2 different strains of CWD, and also TME. All these TSE in different species have been rendered and fed to food producing animals for humans and animals in North America (TSE in cats and dogs ?), and that the trading of these TSEs via animals and products via the USA and Canada has been immense over the years, decades.
Methods:
12 years independent research of available data
Results:
I propose that the current diagnostic criteria for human TSEs only enhances and helps the spreading of human TSE from the continued belief of the UKBSEnvCJD only theory in 2009. With all the science to date refuting it, to continue to validate this old myth, will only spread this TSE agent through a multitude of potential routes and sources i.e. consumption, medical i.e., surgical, blood, dental, endoscopy, optical, nutritional supplements, cosmetics etc.
Conclusion:
I would like to submit a review of past CJD surveillance in the USA, and the urgent need to make all human TSE in the USA a reportable disease, in every state, of every age group, and to make this mandatory immediately without further delay. The ramifications of not doing so will only allow this agent to spread further in the medical, dental, surgical arena's. Restricting the reporting of CJD and or any human TSE is NOT scientific. Iatrogenic CJD knows NO age group, TSE knows no boundaries. I propose as with Aguzzi, Asante, Collinge, Caughey, Deslys, Dormont, Gibbs, Gajdusek, Ironside, Manuelidis, Marsh, et al and many more, that the world of TSE Transmissible Spongiform Encephalopathy is far from an exact science, but there is enough proven science to date that this myth should be put to rest once and for all, and that we move forward with a new classification for human and animal TSE that would properly identify the infected species, the source species, and then the route.
page 114 ;
http://ww2.isid.org/Downloads/14th_ICID_ISE_Abstracts.pdf
Terry S. Singeltary Sr. has added the following comment:
"According to the World Health Organisation, the future public health threat of vCJD in the UK and Europe and potentially the rest of the world is of concern and currently unquantifiable. However, the possibility of a significant and geographically diverse vCJD epidemic occurring over the next few decades cannot be dismissed .
The key word here is diverse. What does diverse mean?
If USA scrapie transmitted to USA bovine does not produce pathology as the UK c-BSE, then why would CJD from there look like UK vCJD?"
SEE FULL TEXT ;
http://www.promedmail.org/pls/apex/f?p=2400:1001:568933508083034::NO::F2400_P1001_BACK_PAGE,F2400_P1001_PUB_MAIL_ID:1000,82101
Monday, August 9, 2010
National Prion Disease Pathology Surveillance Center Cases Examined (July 31, 2010)
(please watch and listen to the video and the scientist speaking about atypical BSE and sporadic CJD and listen to Professor Aguzzi)
http://prionunitusaupdate2008.blogspot.com/2010/08/national-prion-disease-pathology.html
CJD TEXAS 38 YEAR OLD FEMALE WORKED SLAUGHTERING CATTLE EXPOSED TO BRAIN AND SPINAL CORD MATTER
http://cjdtexas.blogspot.com/2010/03/cjd-texas-38-year-old-female-worked.html
Monday, April 5, 2010
UPDATE - CJD TEXAS 38 YEAR OLD FEMALE WORKED SLAUGHTERING CATTLE EXPOSED TO BRAIN AND SPINAL CORD MATTER
http://prionunitusaupdate2008.blogspot.com/2010/04/update-cjd-texas-38-year-old-female.html
Sunday, July 11, 2010
CJD or prion disease 2 CASES McLennan County Texas population 230,213 both cases in their 40s
http://creutzfeldt-jakob-disease.blogspot.com/2010/07/cjd-2-cases-mclennan-county-texas.html
Tuesday, June 1, 2010
USA cases of dpCJD rising with 24 cases so far in 2010
http://cjdtexas.blogspot.com/2010/06/usa-cases-of-dpcjd-rising-with-24-cases.html
Monday, September 13, 2010
atypical BSE strains and sporadic CJD strains, is there a connection and why shouldn't there be $
http://bse-atypical.blogspot.com/2010/09/atypical-bse-strains-and-sporadic-cjd.html
Thursday, July 08, 2010
GLOBAL CLUSTERS OF CREUTZFELDT JAKOB DISEASE - A REVIEW 2010
http://creutzfeldt-jakob-disease.blogspot.com/2010/07/global-clusters-of-creutzfeldt-jakob.html
Friday, February 05, 2010
New Variant Creutzfelt Jakob Disease case reports United States 2010 A Review
http://vcjd.blogspot.com/2010/02/new-variant-creutzfelt-jakob-disease.html
Manuscript Draft Manuscript Number: Title: HUMAN and ANIMAL TSE Classifications i.e. mad cow disease and the UKBSEnvCJD only theory Article Type: Personal View Corresponding Author: Mr. Terry S. Singeltary, Corresponding Author's Institution: na First Author: Terry S Singeltary, none Order of Authors: Terry S Singeltary, none; Terry S. Singeltary
Abstract: TSEs have been rampant in the USA for decades in many species, and they all have been rendered and fed back to animals for human/animal consumption. I propose that the current diagnostic criteria for human TSEs only enhances and helps the spreading of human TSE from the continued belief of the UKBSEnvCJD only theory in 2007.
http://www.regulations.gov/fdmspublic/ContentViewer?objectId=090000648027c28e&disposition=attachment&contentType=pdf
Saturday, June 13, 2009
Monitoring the occurrence of emerging forms of Creutzfeldt-Jakob disease in the United States 2003 revisited 2009
http://cjdusa.blogspot.com/2009/06/monitoring-occurrence-of-emerging-forms.html
Saturday, January 2, 2010
Human Prion Diseases in the United States January 1, 2010 ***FINAL***
http://prionunitusaupdate2008.blogspot.com/2010/01/human-prion-diseases-in-united-states.html
my comments to PLosone here ;
http://www.plosone.org/annotation/listThread.action?inReplyTo=info%3Adoi%2F10.1371%2Fannotation%2F04ce2b24-613d-46e6-9802-4131e2bfa6fd&root=info%3Adoi%2F10.1371%2Fannotation%2F04ce2b24-613d-46e6-9802-4131e2bfa6fd
Monday, August 9, 2010
National Prion Disease Pathology Surveillance Center Cases Examined (July 31, 2010)
(please watch and listen to the video and the scientist speaking about atypical BSE and sporadic CJD and listen to Professor Aguzzi)
SEE where sporadic cjd in the USA went from 59 cases in 1997, to 216 cases in 2009. a steady increase since 1997. ...TSS
National Prion Disease Pathology Surveillance Center Cases Examined (July 31, 2010)
Year Total Referrals2 Prion Disease Sporadic Familial Iatrogenic vCJD
1997 114 68 59 9 0 0
to
2009 425 259 216 43 0 0
http://www.cjdsurveillance.com/pdf/case-table.pdf
see full text ;
http://prionunitusaupdate2008.blogspot.com/2010/08/national-prion-disease-pathology.html
HOW many of you recieved a written CJD Questionnaire asking real questions pertaining to route and source (and there are many here in North America) ?
IS every case getting a cjd questionnaire asking real questions ???
Friday, November 30, 2007
CJD QUESTIONNAIRE USA CWRU AND CJD FOUNDATION USA PRION UNIT
http://cjdquestionnaire.blogspot.com/2007/11/cjd-questionnaire.html
TSS
a group of progressive and fatal conditions that are associated with prions and affect the brain and nervous system of many animals and humans.
Tuesday, November 30, 2010
Monday, November 22, 2010
Atypical transmissible spongiform encephalopathies in ruminants: a challenge for disease surveillance and control
REVIEW ARTICLES
Atypical transmissible spongiform encephalopathies in ruminants: a challenge for disease surveillance and control
Torsten Seuberlich1, Dagmar Heim and Andreas Zurbriggen Correspondence: 1Corresponding Author: Torsten Seuberlich, NeuroCentre, National and OIE Reference Laboratories for BSE and Scrapie, DCR-VPH, Bremgartenstrasse 109a, CH-3001 Berne, Switzerland. torsten.seuberlich@itn.unibe.ch
Since 1987, when bovine spongiform encephalopathy (BSE) emerged as a novel disease in cattle, enormous efforts were undertaken to monitor and control the disease in ruminants worldwide. The driving force was its high economic impact, which resulted from trade restrictions and the loss of consumer confidence in beef products, the latter because BSE turned out to be a fatal zoonosis, causing variant Creutzfeldt–Jakob disease in human beings. The ban on meat and bone meal in livestock feed and the removal of specified risk materials from the food chain were the main measures to successfully prevent infection in cattle and to protect human beings from BSE exposure. However, although BSE is now under control, previously unknown, so-called atypical transmissible spongiform encephalopathies (TSEs) in cattle and small ruminants have been identified by enhanced disease surveillance. This report briefly reviews and summarizes the current level of knowledge on the spectrum of TSEs in cattle and small ruminants and addresses the question of the extent to which such atypical TSEs have an effect on disease surveillance and control strategies.
Key Words: Atypical • bovine spongiform encephalopathy • cattle • disease control • prion • ruminants • scrapie • transmissible spongiform encephalopathies
http://jvdi.org/cgi/content/abstract/22/6/823?maxtoshow=&hits=10&RESULTFORMAT=&fulltext=prion&searchid=1&FIRSTINDEX=0&volume=22&issue=6&resourcetype=HWCIT
Tuesday, November 02, 2010
BSE - ATYPICAL LESION DISTRIBUTION (RBSE 92-21367) statutory (obex only) diagnostic criteria CVL 1992
http://bse-atypical.blogspot.com/2010/11/bse-atypical-lesion-distribution-rbse.html
J. Virol. doi:10.1128/JVI.01578-10 Copyright (c) 2010, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.
Increased susceptibility of human-PrP transgenic mice to bovine spongiform encephalopathy following passage in sheep.
Chris Plinston, Patricia Hart, Angela Chong, Nora Hunter, James Foster, Pedro Piccardo, Jean C. Manson, and Rona M Barron* Neuropathogenesis Division, The Roslin Institute and R(D)SVS, University of Edinburgh, Roslin, Midlothian, UK; Laboratory of Bacterial and TSE Agents, Food and Drug Administration, Rockville, MD, USA
* To whom correspondence should be addressed. Email: rona.barron@roslin.ed.ac.uk .
Abstract
The risk of transmission of ruminant transmissible spongiform encephalopathy (TSE) to humans was thought to be low due to the lack of association between sheep scrapie and incidence of human TSE. However a single TSE agent strain has been shown to cause both bovine spongiform encephalopathy (BSE) and human vCJD, indicating that some ruminant TSEs may be transmissible to humans. While the transmission of cattle BSE to humans in transgenic mouse models has been inefficient, indicating the presence of a significant transmission barrier between cattle and humans, BSE has been transmitted to a number of other species. Here we aimed to further investigate the human transmission barrier following passage of BSE in a sheep. Following inoculation with cattle BSE, gene targeted transgenic mice expressing human PrP showed no clinical or pathological signs of TSE disease. However following inoculation with an isolate of BSE that had been passaged through a sheep, TSE associated vacuolation and proteinase-K resistant PrP deposition were observed in mice homozygous for the codon 129-methionine PRNP gene. This observation may be due to higher titres of the BSE agent in sheep, or an increased susceptibility of humans to BSE prions following passage through a sheep. However these data confirm that, contrary to previous predictions, it is possible that a sheep prion may be transmissible to humans and that BSE from other species may be a public health risk.
http://jvi.asm.org/cgi/content/abstract/JVI.01578-10v1?etoc
let's look at some old data again shall we ;
Technical Abstract:
Prion strains may vary in their ability to transmit to humans and animals. Few experimental studies have been done to provide evidence of differences between U.S. strains of scrapie, which can be distinguished by incubation times in inbred mice, microscopic lesions, immunoreactivity to various antibodies, or molecular profile (electrophoretic mobility and glycoform ratio). Recent work on two U.S. isolates of sheep scrapie supports that at least two distinct strains exist based on differences in incubation time and genotype of sheep affected. One isolate (No. 13-7) inoculated intracerebrally caused scrapie in sheep AA at codon 136 (AA136) and QQ at codon 171 (QQ171) of the prion protein in an average of 19 months post-inoculation (PI) whereas a second isolate (No. x124) caused disease in less than 12 months after oral inoculation in AV136/QQ171 sheep. Striking differences were evident when further strain analysis was done in R111, VM, C57Bl6, and C57Bl6xVM (F1) mice. No. 13-7 did not induce disease in any mouse strain at any time post-inoculation (PI) nor were brain tissues positive by western blot (WB). Positive WB results were obtained from mice inoculated with isolate No. x124 starting at day 380 PI. Incubation times averaged 508, 559, 601, and 633 days PI for RIII, C57Bl6, VM, and F1 mice, respectively. Further passage will be required to characterize these scrapie strains in mice. This work provides evidence that multiple scrapie strains exist in U.S. sheep.
http://www.ars.usda.gov/research/publications/publications.htm?seq_no_115=227516
One of these isolates (TR316211) behaved like the CH1641 isolate, with PrPres features in mice similar to those in the sheep brain. From two other isolates (O100 and O104), two distinct PrPres phenotypes were identified in mouse brains, with either high (h-type) or low (l-type) apparent molecular masses of unglycosylated PrPres, the latter being similar to that observed with CH1641, TR316211, or BSE. Both phenotypes could be found in variable proportions in the brains of the individual mice. In contrast with BSE, l-type PrPres from "CH1641-like" isolates showed lower levels of diglycosylated PrPres. From one of these cases (O104), a second passage in mice was performed for two mice with distinct PrPres profiles. This showed a partial selection of the l-type phenotype in mice infected with a mouse brain with predominant l-type PrPres, and it was accompanied by a significant increase in the proportions of the diglycosylated band. These results are discussed in relation to the diversity of scrapie and BSE strains.
http://jvi.asm.org/cgi/content/full/81/13/7230?view=long&pmid=17442721
In the US, scrapie is reported primarily in sheep homozygous for 136A/171Q (AAQQ) and the disease phenotype is similar to that seen with experimental strain CH1641.
http://www.ars.usda.gov/research/publications/publications.htm?seq_no_115=182469
Sunday, October 3, 2010
Scrapie, Nor-98 atypical Scrapie, and BSE in sheep and goats North America, who's looking ?
snip...
4.2.9 A further hypothesis to explain the occurrence of BSE is the emergence or selection of a strain or strains of the scrapie agent pathogenic for cattle. Mutations of the scrapie agent. which can occur after a single passage in mice. have been well documented (9). This phenomenon cannot be dismissed for BSE. but given the form of the epidemic and the geographically widespread occurrence of BSE, such a hypothesis" would require the emergence of a mutant scrapie strain simultaneously in a large . number of sheep flocks, or cattle. throughout the country. Also. if it resulted "from a localised chance transmission of the scrapie strain from sheep to cattle giving rise , . to a mutant. a different pattern of disease would have been expected: its range would '. have increased with time. Thus the evidence from Britain is against the disease being due to a new strain of the agent, but we note that in the United States from 1984 to 1988 outbreaks of scrapie in sheep flocks are reported to have Increased markedly. now being nearly 3 times as high as during any previous period (18).
http://collections.europarchive.org/tna/20080102132706/http://www.bseinquiry.gov.uk/files/ib/ibd1/tab02.pdf
If the scrapie agent is generated from ovine DNA and thence causes disease in other species, then perhaps, bearing in mind the possible role of scrapie in CJD of humans (Davinpour et al, 1985), scrapie and not BSE should be the notifiable disease. ...
http://collections.europarchive.org/tna/20090505194948/http://bseinquiry.gov.uk/files/yb/1988/06/08004001.pdf
http://scrapie-usa.blogspot.com/2007/12/scrapie-hb-parry-seriously-yb886841.html
hmmm, this is getting interesting now...
Sporadic CJD type 1 and atypical/ Nor98 scrapie are characterized by fine (reticular) deposits,
see also ;
All of the Heidenhain variants were of the methionine/ methionine type 1 molecular subtype.
http://cjdusa.blogspot.com/2009/09/co-existence-of-scrapie-prion-protein.html
Tuesday, July 29, 2008
Heidenhain Variant Creutzfeldt Jakob Disease Case Report
snip...
Heidenhain Variant Creutzfeldt Jakob Disease autopsy case report 'MOM'
DIVISION OF NEUROPATHOLOGY University of Texas Medical Branch 114 McCullough Bldg. Galveston, Texas 77555-0785
FAX COVER SHEET
DATE: 4-23-98
TO: Mr. Terry Singeltary @ -------
FROM: Gerald Campbell
FAX: (409) 772-5315 PHONE: (409) 772-2881
Number of Pages (including cover sheet):
Message:
*CONFIDENTIALITY NOTICE*
This document accompanying this transmission contains confidential information belonging to the sender that is legally privileged. This information is intended only for the use of the individual or entry names above. If you are not the intended recipient, you are hereby notified that any disclosure, copying distribution, or the taking of any action in reliances on the contents of this telefaxed information is strictly prohibited. If you received this telefax in error, please notify us by telephone immediately to arrange for return of the original documents. -------------------------- Patient Account: 90000014-518 Med. Rec. No.: (0160)118511Q Patient Name: POULTER, BARBARA Age: 63 YRS DOB: 10/17/34 Sex: F Admitting Race: C
Attending Dr.: Date / Time Admitted : 12/14/97 1228 Copies to:
UTMB University of Texas Medical Branch Galveston, Texas 77555-0543 (409) 772-1238 Fax (409) 772-5683 Pathology Report
FINAL AUTOPSY DIAGNOSIS Autopsy' Office (409)772-2858
Autopsy NO.: AU-97-00435
AUTOPSY INFORMATION: Occupation: Unknown Birthplace: Unknown Residence: Crystal Beach Date/Time of Death: 12/14/97 13:30 Date/Time of Autopsy: 12/15/97 15:00 Pathologist/Resident: Pencil/Fernandez Service: Private Restriction: Brain only
FINAL AUTOPSY DIAGNOSIS
I. Brain: Creutzfeldt-Jakob disease, Heidenhain variant.
snip...see full text ;
http://creutzfeldt-jakob-disease.blogspot.com/2008/07/heidenhain-variant-creutzfeldt-jakob.html
Monday, December 14, 2009
Similarities between Forms of Sheep Scrapie and Creutzfeldt-Jakob Disease Are Encoded by Distinct Prion Types
http://nor-98.blogspot.com/2009/12/similarities-between-forms-of-sheep.html
snip...
EVIDENCE OF SCRAPIE IN SHEEP AS A RESULT OF FOOD BORNE EXPOSURE
This is provided by the statistically significant increase in the incidence of sheep scrape from 1985, as determined from analyses of the submissions made to VI Centres, and from individual case and flock incident studies. ........
http://web.archive.org/web/20010305222246/www.bseinquiry.gov.uk/files/yb/1994/02/07002001.pdf
1: J Infect Dis 1980 Aug;142(2):205-8
Oral transmission of kuru, Creutzfeldt-Jakob disease, and scrapie to nonhuman primates.
Gibbs CJ Jr, Amyx HL, Bacote A, Masters CL, Gajdusek DC.
Kuru and Creutzfeldt-Jakob disease of humans and scrapie disease of sheep and goats were transmitted to squirrel monkeys (Saimiri sciureus) that were exposed to the infectious agents only by their nonforced consumption of known infectious tissues. The asymptomatic incubation period in the one monkey exposed to the virus of kuru was 36 months; that in the two monkeys exposed to the virus of Creutzfeldt-Jakob disease was 23 and 27 months, respectively; and that in the two monkeys exposed to the virus of scrapie was 25 and 32 months, respectively. Careful physical examination of the buccal cavities of all of the monkeys failed to reveal signs or oral lesions. One additional monkey similarly exposed to kuru has remained asymptomatic during the 39 months that it has been under observation.
snip...
The successful transmission of kuru, Creutzfeldt-Jakob disease, and scrapie by natural feeding to squirrel monkeys that we have reported provides further grounds for concern that scrapie-infected meat may occasionally give rise in humans to Creutzfeldt-Jakob disease.
PMID: 6997404
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6997404&dopt=Abstract
12/10/76 AGRICULTURAL RESEARCH COUNCIL REPORT OF THE ADVISORY COMMITTE ON SCRAPIE Office Note CHAIRMAN: PROFESSOR PETER WILDY
snip...
A The Present Position with respect to Scrapie A] The Problem Scrapie is a natural disease of sheep and goats. It is a slow and inexorably progressive degenerative disorder of the nervous system and it ia fatal. It is enzootic in the United Kingdom but not in all countries. The field problem has been reviewed by a MAFF working group (ARC 35/77). It is difficult to assess the incidence in Britain for a variety of reasons but the disease causes serious financial loss; it is estimated that it cost Swaledale breeders alone $l.7 M during the five years 1971-1975. A further inestimable loss arises from the closure of certain export markets, in particular those of the United States, to British sheep. It is clear that scrapie in sheep is important commercially and for that reason alone effective measures to control it should be devised as quickly as possible. Recently the question has again been brought up as to whether scrapie is transmissible to man. This has followed reports that the disease has been transmitted to primates.
One particularly lurid speculation (Gajdusek 1977) conjectures that the agents of scrapie, kuru, Creutzfeldt-Jakob disease and transmissible encephalopathy of mink are varieties of a single "virus". The U.S. Department of Agriculture concluded that it could "no longer justify or permit scrapie-blood line and scrapie-exposed sheep and goats to be processed for human or animal food at slaughter or rendering plants" (ARC 84/77)" The problem is emphasised by the finding that some strains of scrapie produce lesions identical to the once which characterise the human dementias" Whether true or not. the hypothesis that these agents might be transmissible to man raises two considerations. First, the safety of laboratory personnel requires prompt attention. Second, action such as the "scorched meat" policy of USDA makes the solution of the acrapie problem urgent if the sheep industry is not to suffer grievously.
snip...
76/10.12/4.6
http://web.archive.org/web/20010305223125/www.bseinquiry.gov.uk/files/yb/1976/10/12004001.pdf
Nature. 1972 Mar 10;236(5341):73-4.
Transmission of scrapie to the cynomolgus monkey (Macaca fascicularis).
Gibbs CJ Jr, Gajdusek DC. Nature 236, 73 - 74 (10 March 1972); doi:10.1038/236073a0
Transmission of Scrapie to the Cynomolgus Monkey (Macaca fascicularis)
C. J. GIBBS jun. & D. C. GAJDUSEK National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, Maryland
SCRAPIE has been transmitted to the cynomolgus, or crab-eating, monkey (Macaca fascicularis) with an incubation period of more than 5 yr from the time of intracerebral inoculation of scrapie-infected mouse brain. The animal developed a chronic central nervous system degeneration, with ataxia, tremor and myoclonus with associated severe scrapie-like pathology of intensive astroglial hypertrophy and proliferation, neuronal vacuolation and status spongiosus of grey matter. The strain of scrapie virus used was the eighth passage in Swiss mice (NIH) of a Compton strain of scrapie obtained as ninth intracerebral passage of the agent in goat brain, from Dr R. L. Chandler (ARC, Compton, Berkshire).
http://www.nature.com/nature/journal/v236/n5341/abs/236073a0.html
Epidemiology of Scrapie in the United States 1977
http://web.archive.org/web/20030513212324/http://www.bseinquiry.gov.uk/files/mb/m08b/tab64.pdf
Like lambs to the slaughter
31 March 2001
by Debora MacKenzie Magazine issue 2284
FOUR years ago, Terry Singeltary watched his mother die horribly from a degenerative brain disease. Doctors told him it was Alzheimer's, but Singeltary was suspicious. The diagnosis didn't fit her violent symptoms, and he demanded an autopsy. It showed she had died of sporadic Creutzfeldt-Jakob disease. Most doctors believe that sCJD is caused by a prion protein deforming by chance into a killer. But Singeltary thinks otherwise. He is one of a number of campaigners who say that some sCJD, like the variant CJD related to BSE, is caused by eating meat from infected animals. Their suspicions have focused on sheep carrying scrapie, a BSE-like disease that is widespread in flocks across Europe and North America. Now scientists in France have stumbled across new evidence that adds weight to the campaigners' fears. To their complete surprise, the researchers found that one strain of scrapie causes the same brain damage in ...
http://www.newscientist.com/article/mg16922840.300-like-lambs-to-the-slaughter.html
please see full text ;
Sunday, October 3, 2010
Scrapie, Nor-98 atypical Scrapie, and BSE in sheep and goats North America, who's looking ?
http://nor-98.blogspot.com/2010/10/scrapie-nor-98-atypical-scrapie-and-bse.html
Friday, August 27, 2010
NEW ATYPICAL NOR-98 SCRAPIE CASE DETECTED IDAHO NOW 5 CASES DOCUMENTED 2010
http://nor-98.blogspot.com/2010/08/new-atypical-nor-98-scrapie-case.html
Thursday, August 19, 2010
SCRAPIE CANADA UPDATE Current as of 2010-07-31 The following table lists sheep flocks and/or goat herds confirmed to be infected with scrapie in Canada in 2010.
Current as of: 2010-07-31
http://nor-98.blogspot.com/2010/08/scrapie-canada-update-current-as-of.html
Monday, December 14, 2009
Similarities between Forms of Sheep Scrapie and Creutzfeldt-Jakob Disease Are Encoded by Distinct Prion Types
http://nor-98.blogspot.com/2009/12/similarities-between-forms-of-sheep.html
Sunday, March 28, 2010
Nor-98 atypical Scrapie, atypical BSE, spontaneous TSE, trade policy, sound science ?
http://nor-98.blogspot.com/2010/03/nor-98-atypical-scrapie-atypical-bse.html
P03.141
Aspects of the Cerebellar Neuropathology in Nor98
Gavier-Widén, D1; Benestad, SL2; Ottander, L1; Westergren, E1 1National Veterinary Insitute, Sweden; 2National Veterinary Institute,
Norway Nor98 is a prion disease of old sheep and goats. This atypical form of scrapie was first described in Norway in 1998. Several features of Nor98 were shown to be different from classical scrapie including the distribution of disease associated prion protein (PrPd) accumulation in the brain. The cerebellum is generally the most affected brain area in Nor98. The study here presented aimed at adding information on the neuropathology in the cerebellum of Nor98 naturally affected sheep of various genotypes in Sweden and Norway. A panel of histochemical and immunohistochemical (IHC) stainings such as IHC for PrPd, synaptophysin, glial fibrillary acidic protein, amyloid, and cell markers for phagocytic cells were conducted. The type of histological lesions and tissue reactions were evaluated. The types of PrPd deposition were characterized. The cerebellar cortex was regularly affected, even though there was a variation in the severity of the lesions from case to case. Neuropil vacuolation was more marked in the molecular layer, but affected also the granular cell layer. There was a loss of granule cells. Punctate deposition of PrPd was characteristic. It was morphologically and in distribution identical with that of synaptophysin, suggesting that PrPd accumulates in the synaptic structures. PrPd was also observed in the granule cell layer and in the white matter. The pathology features of Nor98 in the cerebellum of the affected sheep showed similarities with those of sporadic Creutzfeldt-Jakob disease in humans.
***The pathology features of Nor98 in the cerebellum of the affected sheep showed similarities with those of sporadic Creutzfeldt-Jakob disease in humans.
http://www.prion2007.com/pdf/Prion%20Book%20of%20Abstracts.pdf
PR-26
NOR98 SHOWS MOLECULAR FEATURES REMINISCENT OF GSS
R. Nonno1, E. Esposito1, G. Vaccari1, E. Bandino2, M. Conte1, B. Chiappini1, S. Marcon1, M. Di Bari1, S.L. Benestad3, U. Agrimi1 1 Istituto Superiore di Sanità, Department of Food Safety and Veterinary Public Health, Rome, Italy (romolo.nonno@iss.it); 2 Istituto Zooprofilattico della Sardegna, Sassari, Italy; 3 National Veterinary Institute, Department of Pathology, Oslo, Norway
Molecular variants of PrPSc are being increasingly investigated in sheep scrapie and are generally referred to as "atypical" scrapie, as opposed to "classical scrapie". Among the atypical group, Nor98 seems to be the best identified. We studied the molecular properties of Italian and Norwegian Nor98 samples by WB analysis of brain homogenates, either untreated, digested with different concentrations of proteinase K, or subjected to enzymatic deglycosylation. The identity of PrP fragments was inferred by means of antibodies spanning the full PrP sequence. We found that undigested brain homogenates contain a Nor98-specific PrP fragment migrating at 11 kDa (PrP11), truncated at both the C-terminus and the N-terminus, and not N-glycosylated. After mild PK digestion, Nor98 displayed full-length PrP (FL-PrP) and N-glycosylated C-terminal fragments (CTF), along with increased levels of PrP11. Proteinase K digestion curves (0,006-6,4 mg/ml) showed that FL-PrP and CTF are mainly digested above 0,01 mg/ml, while PrP11 is not entirely digested even at the highest concentrations, similarly to PrP27-30 associated with classical scrapie. Above 0,2 mg/ml PK, most Nor98 samples showed only PrP11 and a fragment of 17 kDa with the same properties of PrP11, that was tentatively identified as a dimer of PrP11. Detergent solubility studies showed that PrP11 is insoluble in 2% sodium laurylsorcosine and is mainly produced from detergentsoluble, full-length PrPSc. Furthermore, among Italian scrapie isolates, we found that a sample with molecular and pathological properties consistent with Nor98 showed plaque-like deposits of PrPSc in the thalamus when the brain was analysed by PrPSc immunohistochemistry. Taken together, our results show that the distinctive pathological feature of Nor98 is a PrP fragment spanning amino acids ~ 90-155. This fragment is produced by successive N-terminal and C-terminal cleavages from a full-length and largely detergent-soluble PrPSc, is produced in vivo and is extremely resistant to PK digestion.
*** Intriguingly, these conclusions suggest that some pathological features of Nor98 are reminiscent of Gerstmann-Sträussler-Scheinker disease.
119
http://www.neuroprion.com/pdf_docs/conferences/prion2006/abstract_book.pdf
A newly identified type of scrapie agent can naturally infect sheep with resistant PrP genotypes
Annick Le Dur*,?, Vincent Béringue*,?, Olivier Andréoletti?, Fabienne Reine*, Thanh Lan Laï*, Thierry Baron§, Bjørn Bratberg¶, Jean-Luc Vilotte?, Pierre Sarradin**, Sylvie L. Benestad¶, and Hubert Laude*,?? +Author Affiliations
*Virologie Immunologie Moléculaires and ?Génétique Biochimique et Cytogénétique, Institut National de la Recherche Agronomique, 78350 Jouy-en-Josas, France; ?Unité Mixte de Recherche, Institut National de la Recherche Agronomique-Ecole Nationale Vétérinaire de Toulouse, Interactions Hôte Agent Pathogène, 31066 Toulouse, France; §Agence Française de Sécurité Sanitaire des Aliments, Unité Agents Transmissibles Non Conventionnels, 69364 Lyon, France; **Pathologie Infectieuse et Immunologie, Institut National de la Recherche Agronomique, 37380 Nouzilly, France; and ¶Department of Pathology, National Veterinary Institute, 0033 Oslo, Norway
***Edited by Stanley B. Prusiner, University of California, San Francisco, CA (received for review March 21, 2005)
Abstract Scrapie in small ruminants belongs to transmissible spongiform encephalopathies (TSEs), or prion diseases, a family of fatal neurodegenerative disorders that affect humans and animals and can transmit within and between species by ingestion or inoculation. Conversion of the host-encoded prion protein (PrP), normal cellular PrP (PrPc), into a misfolded form, abnormal PrP (PrPSc), plays a key role in TSE transmission and pathogenesis. The intensified surveillance of scrapie in the European Union, together with the improvement of PrPSc detection techniques, has led to the discovery of a growing number of so-called atypical scrapie cases. These include clinical Nor98 cases first identified in Norwegian sheep on the basis of unusual pathological and PrPSc molecular features and "cases" that produced discordant responses in the rapid tests currently applied to the large-scale random screening of slaughtered or fallen animals. Worryingly, a substantial proportion of such cases involved sheep with PrP genotypes known until now to confer natural resistance to conventional scrapie. Here we report that both Nor98 and discordant cases, including three sheep homozygous for the resistant PrPARR allele (A136R154R171), efficiently transmitted the disease to transgenic mice expressing ovine PrP, and that they shared unique biological and biochemical features upon propagation in mice. *** These observations support the view that a truly infectious TSE agent, unrecognized until recently, infects sheep and goat flocks and may have important implications in terms of scrapie control and public health.
http://www.pnas.org/content/102/44/16031.abstract
Monday, December 1, 2008
When Atypical Scrapie cross species barriers
Authors
Andreoletti O., Herva M. H., Cassard H., Espinosa J. C., Lacroux C., Simon S., Padilla D., Benestad S. L., Lantier F., Schelcher F., Grassi J., Torres, J. M., UMR INRA ENVT 1225, Ecole Nationale Veterinaire de Toulouse.France; ICISA-INlA, Madrid, Spain; CEA, IBiTec-5, DSV, CEA/Saclay, Gif sur Yvette cedex, France; National Veterinary Institute, Postboks 750 Sentrum, 0106 Oslo, Norway, INRA IASP, Centre INRA de Tours, 3738O Nouzilly, France.
Content
Atypical scrapie is a TSE occurring in small ruminants and harbouring peculiar clinical, epidemiological and biochemical properties. Currently this form of disease is identified in a large number of countries. In this study we report the transmission of an atypical scrapie isolate through different species barriers as modeled by transgenic mice (Tg) expressing different species PRP sequence.
The donor isolate was collected in 1995 in a French commercial sheep flock. inoculation into AHQ/AHQ sheep induced a disease which had all neuro-pathological and biochemical characteristics of atypical scrapie. Transmitted into Transgenic mice expressing either ovine or PrPc, the isolate retained all the described characteristics of atypical scrapie.
Surprisingly the TSE agent characteristics were dramatically different v/hen passaged into Tg bovine mice. The recovered TSE agent had biological and biochemical characteristics similar to those of atypical BSE L in the same mouse model. Moreover, whereas no other TSE agent than BSE were shown to transmit into Tg porcine mice, atypical scrapie was able to develop into this model, albeit with low attack rate on first passage.
Furthermore, after adaptation in the porcine mouse model this prion showed similar biological and biochemical characteristics than BSE adapted to this porcine mouse model. Altogether these data indicate.
(i) the unsuspected potential abilities of atypical scrapie to cross species barriers
(ii) the possible capacity of this agent to acquire new characteristics when crossing species barrier
These findings raise some interrogation on the concept of TSE strain and on the origin of the diversity of the TSE agents and could have consequences on field TSE control measures.
http://www.neuroprion.org/resources/pdf_docs/conferences/prion2008/abstract-book-prion2008.pdf
$$$
Monday, November 30, 2009
USDA AND OIE COLLABORATE TO EXCLUDE ATYPICAL SCRAPIE NOR-98 ANIMAL HEALTH CODE
http://nor-98.blogspot.com/2009/11/usda-and-oie-collaborate-to-exclude.html
Thursday, November 18, 2010
UNITED STATES OF AMERICA VS GALEN J. NIEHUES FAKED MAD COW FEED TEST ON 92 BSE INSPECTION REPORTS FOR APPROXIMATELY 100 CATTLE OPERATIONS
http://bse-atypical.blogspot.com/2010/11/united-states-of-america-vs-galen-j.html
Wednesday, November 17, 2010
MAD COW TESTING FAKED IN USA BY Nebraska INSPECTOR Senator Mike Johanns STATE
http://madcowtesting.blogspot.com/2010/11/mad-cow-testing-faked-in-usa-by.html
Tuesday, November 02, 2010
IN CONFIDENCE
The information contained herein should not be disseminated further except on the basis of "NEED TO KNOW".
BSE - ATYPICAL LESION DISTRIBUTION (RBSE 92-21367) statutory (obex only) diagnostic criteria CVL 1992
http://bse-atypical.blogspot.com/2010/11/bse-atypical-lesion-distribution-rbse.html
Seven main threats for the future linked to prions
The NeuroPrion network has identified seven main threats for the future linked to prions.
First threat
The TSE road map defining the evolution of European policy for protection against prion diseases is based on a certain numbers of hypotheses some of which may turn out to be erroneous. In particular, a form of BSE (called atypical Bovine Spongiform Encephalopathy), recently identified by systematic testing in aged cattle without clinical signs, may be the origin of classical BSE and thus potentially constitute a reservoir, which may be impossible to eradicate if a sporadic origin is confirmed.
*** Also, a link is suspected between atypical BSE and some apparently sporadic cases of Creutzfeldt-Jakob disease in humans. These atypical BSE cases constitute an unforeseen first threat that could sharply modify the European approach to prion diseases.
Second threat
In small ruminants, a new atypical form of scrapie currently represents up to 50% of detected cases and even involves sheep selected for resistance to classical scrapie. The consequences for animal and human health are still unknown and there may be a potential connection with atypical BSE. These atypical scrapie cases constitute a second threat not envisioned previously which could deeply modify the European approach to prion diseases.
Third threat
The species barrier between human and cattle might be weaker than previously expected and the risk of transmission of prion diseases between different species has been notoriously unpredictable. The emergence of new atypical strains in cattle and sheep together with the spread of chronic wasting disease in cervids renders the understanding of the species barrier critical. This constitutes a third threat not properly envisioned previously that could deeply modify the European approach to prion diseases.
Fourth threat
Prion infectivity has now been detected in blood, urine and milk and this has potential consequences on risk assessments for the environment and food as well as for contamination of surfaces including medical instruments. Furthermore the procedures recommended for decontamination of MBM (Meat and Bone Meal), which are based on older methodologies not designed for this purpose, have turned out to be of very limited efficacy and compromise current policies concerning the reuse of these high value protein supplements (cross-contamination of feed circuits are difficult to control). It should be noted that the destruction or very limited use of MBM is estimated to still cost 1 billion euros per year to the European economy,
whereas other countries, including the US,
Brazil, and Argentine do not have these constraints.
However, many uncertainties remain concerning the guarantees that can be reasonably provided for food and feed safety and scientific knowledge about the causative agents (prions) will continue to evolve. This decontamination and environmental issue is a fourth threat that could modify deeply the European approach to prion diseases.
Fifth threat The precise nature of prions remains elusive. Very recent data indicate that abnormal prion protein (PrPTSE) can be generated from the brains of normal animals, and under some conditions (including contaminated waste water) PrPTSE can be destroyed whereas the BSE infectious titre remains almost unchanged, a finding that underlines the possibility of having BSE without any detectable diagnostic marker. These are just two areas of our incomplete knowledge of the fundamental biology of prions which constitute a fifth threat to the European approach to prion diseases.
Sixth threat The absence of common methods and standardisation in the evaluation of multiple in vivo models with different prion strains and different transgenic mice expressing PrP from different species (different genotypes of cattle, sheep, cervids, etc) renders a complete and comprehensive analysis of all the data generated by the different scientific groups almost impossible. This deeply impairs risk assessment. Moreover, the possibility of generating PrPTSE de novo with new powerful techniques has raised serious questions about their appropriateness for use as blood screening tests. The confusion about an incorrect interpretation of positive results obtained by these methods constitutes a sixth threat to European approach to prion diseases.
Seventh Threat The detection of new or re-emerging prion diseases in animals or humans which could lead to a new crisis in consumer confidence over the relaxation of precautionary measures and surveillance programmes constitutes a seventh threat that could modify the European approach to prion diseases.
http://www.neuroprion.org/en/np-neuroprion.html
Thursday, August 12, 2010
Seven main threats for the future linked to prions
http://prionpathy.blogspot.com/2010/08/seven-main-threats-for-future-linked-to.html
http://prionpathy.blogspot.com/
Rural and Regional Affairs and Transport References Committee The possible impacts and consequences for public health, trade and agriculture of the Government’s decision to relax import restrictions on beef Final report June 2010
2.65 At its hearing on 14 May 2010, the committee heard evidence from Dr Alan Fahey who has recently submitted a thesis on the clinical neuropsychiatric, epidemiological and diagnostic features of Creutzfeldt-Jakob disease.48 Dr Fahey told the committee of his concerns regarding the lengthy incubation period for transmissible spongiform encephalopathies, the inadequacy of current tests and the limited nature of our current understanding of this group of diseases.49
2.66 Dr Fahey also told the committee that in the last two years a link has been established between forms of atypical CJD and atypical BSE. Dr Fahey said that: They now believe that those atypical BSEs overseas are in fact causing sporadic Creutzfeldt-Jakob disease. They were not sure if it was due to mad sheep disease or a different form. If you look in the textbooks it looks like this is just arising by itself. But in my research I have a summary of a document which states that there has never been any proof that sporadic Creutzfeldt-Jakob disease has arisen de novo—has arisen of itself. There is no proof of that. The recent research is that in fact it is due to atypical forms of mad cow disease which have been found across Europe, have been found in America and have been found in Asia. These atypical forms of mad cow disease typically have even longer incubation periods than the classical mad cow disease.50
http://www.aph.gov.au/senate/committee/rrat_ctte/mad_cows/report/report.pdf
PLEASE SEE FULL TEXT ;
Sunday, October 3, 2010
Scrapie, Nor-98 atypical Scrapie, and BSE in sheep and goats North America, who's looking ?
http://nor-98.blogspot.com/2010/10/scrapie-nor-98-atypical-scrapie-and-bse.html
ALABAMA MAD COW g-h-BSEalabama
In this study, we identified a novel mutation in the bovine prion protein gene (Prnp), called E211K, of a confirmed BSE positive cow from Alabama, United States of America. This mutation is identical to the E200K pathogenic mutation found in humans with a genetic form of CJD. This finding represents the first report of a confirmed case of BSE with a potential pathogenic mutation within the bovine Prnp gene. We hypothesize that the bovine Prnp E211K mutation most likely has caused BSE in "the approximately 10-year-old cow" carrying the E221K mutation.
http://www.plospathogens.org/article/info%3Adoi%2F10.1371%2Fjournal.ppat.1000156
http://www.plospathogens.org/article/fetchObjectAttachment.action?uri=info%3Adoi%2F10.1371%2Fjournal.ppat.1000156&representation=PDF
Saturday, August 14, 2010
BSE Case Associated with Prion Protein Gene Mutation (g-h-BSEalabama) and VPSPr PRIONPATHY
(see mad cow feed in COMMERCE IN ALABAMA...TSS)
http://prionpathy.blogspot.com/2010/08/bse-case-associated-with-prion-protein.html
Wednesday, July 28, 2010
re-Freedom of Information Act Project Number 3625-32000-086-05, Study of Atypical BSE UPDATE July 28, 2010
http://bse-atypical.blogspot.com/2010/07/re-freedom-of-information-act-project.html
Monday, August 9, 2010
Variably protease-sensitive prionopathy: A new sporadic disease of the prion protein or just more PRIONBALONEY ?
http://prionunitusaupdate2008.blogspot.com/2010/08/variably-protease-sensitive-prionopathy.html
PLEASE SEE the dramatic increase in sporadic CJD cases in documented BSE countries, then think, BSE can propagate as nvCJD and sporadic CJD in the lab ;
TOTAL CASES OF SPORADIC CJD (DEATHS) DEFINITE AND PROBABLE CASES
Australia Austria Canada France Germany Italy Netherlands Slovakia Spain Switzerland UK
http://www.eurocjd.ed.ac.uk/sporadic.htm
USA
5 Includes 16 cases in which the diagnosis is pending, and 18 inconclusive cases;
6 Includes 21 (19 from 2010) cases with type determination pending in which the diagnosis of vCJD has been excluded.
2010
PLEASE NOTE REFERENCE LINES 5. AND 6.
Monday, August 9, 2010
National Prion Disease Pathology Surveillance Center Cases Examined (July 31, 2010) Year Total Referrals2 Prion Disease Sporadic Familial Iatrogenic vCJD
1996 & earlier 51 33 28 5 0 0
1997 114 68 59 9 0 0
1998 88 52 44 7 1 0
1999 120 72 64 8 0 0
2000 146 103 89 14 0 0
2001 209 119 109 10 0 0
2002 248 149 125 22 2 0
2003 274 176 137 39 0 0
2004 325 186 164 21 0 1(3)
2005 344 194 157 36 1 0
2006 383 197 166 29 0 2(4)
2007 377 214 187 27 0 0
2008 394 231 204 25 0 0
2009 425 259 216 43 0 0
2010 204 124 85 20 0 0
TOTAL 3702(5) 2177(6) 1834 315 4 3
1 Listed based on the year of death or, if not available, on year of referral;
2 Cases with suspected prion disease for which brain tissue and/or blood (in familial cases) were submitted;
3 Disease acquired in the United Kingdom;
4 Disease was acquired in the United Kingdom in one case and in Saudi Arabia in the other case;
5 Includes 16 cases in which the diagnosis is pending, and 18 inconclusive cases;
6 Includes 21 (19 from 2010) cases with type determination pending in which the diagnosis of vCJD has been excluded.
http://www.cjdsurveillance.com/pdf/case-table.pdf
Monday, August 9, 2010
National Prion Disease Pathology Surveillance Center Cases Examined (July 31, 2010)
(please watch and listen to the video and the scientist speaking about atypical BSE and sporadic CJD and listen to Professor Aguzzi)
http://prionunitusaupdate2008.blogspot.com/2010/08/national-prion-disease-pathology.html
Atypical BSE in Cattle
BSE has been linked to the human disease variant Creutzfeldt Jakob Disease (vCJD). The known exposure pathways for humans contracting vCJD are through the consumption of beef and beef products contaminated by the BSE agent and through blood transfusions. However, recent scientific evidence suggests that the BSE agent may play a role in the development of other forms of human prion diseases as well. These studies suggest that classical type of BSE may cause type 2 sporadic CJD and that H-type atypical BSE is connected with a familial form of CJD.
To date the OIE/WAHO assumes that the human and animal health standards set out in the BSE chapter for classical BSE (C-Type) applies to all forms of BSE which include the H-type and L-type atypical forms. This assumption is scientifically not completely justified and accumulating evidence suggests that this may in fact not be the case. Molecular characterization and the spatial distribution pattern of histopathologic lesions and immunohistochemistry (IHC) signals are used to identify and characterize atypical BSE. Both the L-type and H-type atypical cases display significant differences in the conformation and spatial accumulation of the disease associated prion protein (PrPSc) in brains of afflicted cattle. Transmission studies in bovine transgenic and wild type mouse models support that the atypical BSE types might be unique strains because they have different incubation times and lesion profiles when compared to C-type BSE. When L-type BSE was inoculated into ovine transgenic mice and Syrian hamster the resulting molecular fingerprint had changed, either in the first or a subsequent passage, from L-type into C-type BSE. In addition, non-human primates are specifically susceptible for atypical BSE as demonstrated by an approximately 50% shortened incubation time for L-type BSE as compared to C-type. Considering the current scientific information available, it cannot be assumed that these different BSE types pose the same human health risks as C-type BSE or that these risks are mitigated by the same protective measures.
snip...see full text ;
http://www.prionetcanada.ca/detail.aspx?menu=5&dt=293380&app=93&cat1=387&tp=20&lk=no&cat2
14th ICID International Scientific Exchange Brochure -
Final Abstract Number: ISE.114
Session: International Scientific Exchange
Transmissible Spongiform encephalopathy (TSE) animal and human TSE in North America update October 2009
T. Singeltary
Bacliff, TX, USA
Background:
An update on atypical BSE and other TSE in North America. Please remember, the typical U.K. c-BSE, the atypical l-BSE (BASE), and h-BSE have all been documented in North America, along with the typical scrapie's, and atypical Nor-98 Scrapie, and to date, 2 different strains of CWD, and also TME. All these TSE in different species have been rendered and fed to food producing animals for humans and animals in North America (TSE in cats and dogs ?), and that the trading of these TSEs via animals and products via the USA and Canada has been immense over the years, decades.
Methods:
12 years independent research of available data
Results:
I propose that the current diagnostic criteria for human TSEs only enhances and helps the spreading of human TSE from the continued belief of the UKBSEnvCJD only theory in 2009. With all the science to date refuting it, to continue to validate this old myth, will only spread this TSE agent through a multitude of potential routes and sources i.e. consumption, medical i.e., surgical, blood, dental, endoscopy, optical, nutritional supplements, cosmetics etc.
Conclusion:
I would like to submit a review of past CJD surveillance in the USA, and the urgent need to make all human TSE in the USA a reportable disease, in every state, of every age group, and to make this mandatory immediately without further delay. The ramifications of not doing so will only allow this agent to spread further in the medical, dental, surgical arena's. Restricting the reporting of CJD and or any human TSE is NOT scientific. Iatrogenic CJD knows NO age group, TSE knows no boundaries. I propose as with Aguzzi, Asante, Collinge, Caughey, Deslys, Dormont, Gibbs, Gajdusek, Ironside, Manuelidis, Marsh, et al and many more, that the world of TSE Transmissible Spongiform Encephalopathy is far from an exact science, but there is enough proven science to date that this myth should be put to rest once and for all, and that we move forward with a new classification for human and animal TSE that would properly identify the infected species, the source species, and then the route.
page 114 ;
http://ww2.isid.org/Downloads/14th_ICID_ISE_Abstracts.pdf
The EMBO Journal (2002) 21, 6358 - 6366 doi:10.1093/emboj/cdf653
BSE prions propagate as either variant CJD-like or sporadic CJD-like prion strains in transgenic mice expressing human prion protein
Emmanuel A. Asante1, Jacqueline M. Linehan1, Melanie Desbruslais1, Susan Joiner1, Ian Gowland1, Andrew L. Wood1, Julie Welch1, Andrew F. Hill1, Sarah E. Lloyd1, Jonathan D.F. Wadsworth1 and John Collinge1
1.MRC Prion Unit and Department of Neurodegenerative Disease, Institute of Neurology, University College, Queen Square, London WC1N 3BG, UK Correspondence to:
John Collinge, E-mail: j.collinge@prion.ucl.ac.uk
Received 1 August 2002; Accepted 17 October 2002; Revised 24 September 2002
--------------------------------------------------------------------------------
Abstract
Variant Creutzfeldt–Jakob disease (vCJD) has been recognized to date only in individuals homozygous for methionine at PRNP codon 129. Here we show that transgenic mice expressing human PrP methionine 129, inoculated with either bovine spongiform encephalopathy (BSE) or variant CJD prions, may develop the neuropathological and molecular phenotype of vCJD, consistent with these diseases being caused by the same prion strain. Surprisingly, however, BSE transmission to these transgenic mice, in addition to producing a vCJD-like phenotype, can also result in a distinct molecular phenotype that is indistinguishable from that of sporadic CJD with PrPSc type 2. These data suggest that more than one BSE-derived prion strain might infect humans; it is therefore possible that some patients with a phenotype consistent with sporadic CJD may have a disease arising from BSE exposure.
Keywords:BSE, Creutzfeldt–Jakob disease, prion, transgenic
http://www.nature.com/emboj/journal/v21/n23/abs/7594869a.html
BSE prions propagate as either variant CJD-like or sporadic CJD-like prion strains in transgenic mice expressing human prion protein
Emmanuel A. Asante, Jacqueline M. Linehan, Melanie Desbruslais, Susan Joiner, Ian Gowland, Andrew L. Wood, Julie Welch, Andrew F. Hill, Sarah E. Lloyd, Jonathan D.F. Wadsworth, and John Collinge1 MRC Prion Unit and Department of Neurodegenerative Disease, Institute of Neurology, University College, Queen Square, London WC1N 3BG, UK 1Corresponding author e-mail: j.collinge@prion.ucl.ac.uk
Received August 1, 2002; Revised September 24, 2002; Accepted October 17, 2002.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC136957/?tool=pubmed
TSS
Atypical transmissible spongiform encephalopathies in ruminants: a challenge for disease surveillance and control
Torsten Seuberlich1, Dagmar Heim and Andreas Zurbriggen Correspondence: 1Corresponding Author: Torsten Seuberlich, NeuroCentre, National and OIE Reference Laboratories for BSE and Scrapie, DCR-VPH, Bremgartenstrasse 109a, CH-3001 Berne, Switzerland. torsten.seuberlich@itn.unibe.ch
Since 1987, when bovine spongiform encephalopathy (BSE) emerged as a novel disease in cattle, enormous efforts were undertaken to monitor and control the disease in ruminants worldwide. The driving force was its high economic impact, which resulted from trade restrictions and the loss of consumer confidence in beef products, the latter because BSE turned out to be a fatal zoonosis, causing variant Creutzfeldt–Jakob disease in human beings. The ban on meat and bone meal in livestock feed and the removal of specified risk materials from the food chain were the main measures to successfully prevent infection in cattle and to protect human beings from BSE exposure. However, although BSE is now under control, previously unknown, so-called atypical transmissible spongiform encephalopathies (TSEs) in cattle and small ruminants have been identified by enhanced disease surveillance. This report briefly reviews and summarizes the current level of knowledge on the spectrum of TSEs in cattle and small ruminants and addresses the question of the extent to which such atypical TSEs have an effect on disease surveillance and control strategies.
Key Words: Atypical • bovine spongiform encephalopathy • cattle • disease control • prion • ruminants • scrapie • transmissible spongiform encephalopathies
http://jvdi.org/cgi/content/abstract/22/6/823?maxtoshow=&hits=10&RESULTFORMAT=&fulltext=prion&searchid=1&FIRSTINDEX=0&volume=22&issue=6&resourcetype=HWCIT
Tuesday, November 02, 2010
BSE - ATYPICAL LESION DISTRIBUTION (RBSE 92-21367) statutory (obex only) diagnostic criteria CVL 1992
http://bse-atypical.blogspot.com/2010/11/bse-atypical-lesion-distribution-rbse.html
J. Virol. doi:10.1128/JVI.01578-10 Copyright (c) 2010, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.
Increased susceptibility of human-PrP transgenic mice to bovine spongiform encephalopathy following passage in sheep.
Chris Plinston, Patricia Hart, Angela Chong, Nora Hunter, James Foster, Pedro Piccardo, Jean C. Manson, and Rona M Barron* Neuropathogenesis Division, The Roslin Institute and R(D)SVS, University of Edinburgh, Roslin, Midlothian, UK; Laboratory of Bacterial and TSE Agents, Food and Drug Administration, Rockville, MD, USA
* To whom correspondence should be addressed. Email: rona.barron@roslin.ed.ac.uk .
Abstract
The risk of transmission of ruminant transmissible spongiform encephalopathy (TSE) to humans was thought to be low due to the lack of association between sheep scrapie and incidence of human TSE. However a single TSE agent strain has been shown to cause both bovine spongiform encephalopathy (BSE) and human vCJD, indicating that some ruminant TSEs may be transmissible to humans. While the transmission of cattle BSE to humans in transgenic mouse models has been inefficient, indicating the presence of a significant transmission barrier between cattle and humans, BSE has been transmitted to a number of other species. Here we aimed to further investigate the human transmission barrier following passage of BSE in a sheep. Following inoculation with cattle BSE, gene targeted transgenic mice expressing human PrP showed no clinical or pathological signs of TSE disease. However following inoculation with an isolate of BSE that had been passaged through a sheep, TSE associated vacuolation and proteinase-K resistant PrP deposition were observed in mice homozygous for the codon 129-methionine PRNP gene. This observation may be due to higher titres of the BSE agent in sheep, or an increased susceptibility of humans to BSE prions following passage through a sheep. However these data confirm that, contrary to previous predictions, it is possible that a sheep prion may be transmissible to humans and that BSE from other species may be a public health risk.
http://jvi.asm.org/cgi/content/abstract/JVI.01578-10v1?etoc
let's look at some old data again shall we ;
Technical Abstract:
Prion strains may vary in their ability to transmit to humans and animals. Few experimental studies have been done to provide evidence of differences between U.S. strains of scrapie, which can be distinguished by incubation times in inbred mice, microscopic lesions, immunoreactivity to various antibodies, or molecular profile (electrophoretic mobility and glycoform ratio). Recent work on two U.S. isolates of sheep scrapie supports that at least two distinct strains exist based on differences in incubation time and genotype of sheep affected. One isolate (No. 13-7) inoculated intracerebrally caused scrapie in sheep AA at codon 136 (AA136) and QQ at codon 171 (QQ171) of the prion protein in an average of 19 months post-inoculation (PI) whereas a second isolate (No. x124) caused disease in less than 12 months after oral inoculation in AV136/QQ171 sheep. Striking differences were evident when further strain analysis was done in R111, VM, C57Bl6, and C57Bl6xVM (F1) mice. No. 13-7 did not induce disease in any mouse strain at any time post-inoculation (PI) nor were brain tissues positive by western blot (WB). Positive WB results were obtained from mice inoculated with isolate No. x124 starting at day 380 PI. Incubation times averaged 508, 559, 601, and 633 days PI for RIII, C57Bl6, VM, and F1 mice, respectively. Further passage will be required to characterize these scrapie strains in mice. This work provides evidence that multiple scrapie strains exist in U.S. sheep.
http://www.ars.usda.gov/research/publications/publications.htm?seq_no_115=227516
One of these isolates (TR316211) behaved like the CH1641 isolate, with PrPres features in mice similar to those in the sheep brain. From two other isolates (O100 and O104), two distinct PrPres phenotypes were identified in mouse brains, with either high (h-type) or low (l-type) apparent molecular masses of unglycosylated PrPres, the latter being similar to that observed with CH1641, TR316211, or BSE. Both phenotypes could be found in variable proportions in the brains of the individual mice. In contrast with BSE, l-type PrPres from "CH1641-like" isolates showed lower levels of diglycosylated PrPres. From one of these cases (O104), a second passage in mice was performed for two mice with distinct PrPres profiles. This showed a partial selection of the l-type phenotype in mice infected with a mouse brain with predominant l-type PrPres, and it was accompanied by a significant increase in the proportions of the diglycosylated band. These results are discussed in relation to the diversity of scrapie and BSE strains.
http://jvi.asm.org/cgi/content/full/81/13/7230?view=long&pmid=17442721
In the US, scrapie is reported primarily in sheep homozygous for 136A/171Q (AAQQ) and the disease phenotype is similar to that seen with experimental strain CH1641.
http://www.ars.usda.gov/research/publications/publications.htm?seq_no_115=182469
Sunday, October 3, 2010
Scrapie, Nor-98 atypical Scrapie, and BSE in sheep and goats North America, who's looking ?
snip...
4.2.9 A further hypothesis to explain the occurrence of BSE is the emergence or selection of a strain or strains of the scrapie agent pathogenic for cattle. Mutations of the scrapie agent. which can occur after a single passage in mice. have been well documented (9). This phenomenon cannot be dismissed for BSE. but given the form of the epidemic and the geographically widespread occurrence of BSE, such a hypothesis" would require the emergence of a mutant scrapie strain simultaneously in a large . number of sheep flocks, or cattle. throughout the country. Also. if it resulted "from a localised chance transmission of the scrapie strain from sheep to cattle giving rise , . to a mutant. a different pattern of disease would have been expected: its range would '. have increased with time. Thus the evidence from Britain is against the disease being due to a new strain of the agent, but we note that in the United States from 1984 to 1988 outbreaks of scrapie in sheep flocks are reported to have Increased markedly. now being nearly 3 times as high as during any previous period (18).
http://collections.europarchive.org/tna/20080102132706/http://www.bseinquiry.gov.uk/files/ib/ibd1/tab02.pdf
If the scrapie agent is generated from ovine DNA and thence causes disease in other species, then perhaps, bearing in mind the possible role of scrapie in CJD of humans (Davinpour et al, 1985), scrapie and not BSE should be the notifiable disease. ...
http://collections.europarchive.org/tna/20090505194948/http://bseinquiry.gov.uk/files/yb/1988/06/08004001.pdf
http://scrapie-usa.blogspot.com/2007/12/scrapie-hb-parry-seriously-yb886841.html
hmmm, this is getting interesting now...
Sporadic CJD type 1 and atypical/ Nor98 scrapie are characterized by fine (reticular) deposits,
see also ;
All of the Heidenhain variants were of the methionine/ methionine type 1 molecular subtype.
http://cjdusa.blogspot.com/2009/09/co-existence-of-scrapie-prion-protein.html
Tuesday, July 29, 2008
Heidenhain Variant Creutzfeldt Jakob Disease Case Report
snip...
Heidenhain Variant Creutzfeldt Jakob Disease autopsy case report 'MOM'
DIVISION OF NEUROPATHOLOGY University of Texas Medical Branch 114 McCullough Bldg. Galveston, Texas 77555-0785
FAX COVER SHEET
DATE: 4-23-98
TO: Mr. Terry Singeltary @ -------
FROM: Gerald Campbell
FAX: (409) 772-5315 PHONE: (409) 772-2881
Number of Pages (including cover sheet):
Message:
*CONFIDENTIALITY NOTICE*
This document accompanying this transmission contains confidential information belonging to the sender that is legally privileged. This information is intended only for the use of the individual or entry names above. If you are not the intended recipient, you are hereby notified that any disclosure, copying distribution, or the taking of any action in reliances on the contents of this telefaxed information is strictly prohibited. If you received this telefax in error, please notify us by telephone immediately to arrange for return of the original documents. -------------------------- Patient Account: 90000014-518 Med. Rec. No.: (0160)118511Q Patient Name: POULTER, BARBARA Age: 63 YRS DOB: 10/17/34 Sex: F Admitting Race: C
Attending Dr.: Date / Time Admitted : 12/14/97 1228 Copies to:
UTMB University of Texas Medical Branch Galveston, Texas 77555-0543 (409) 772-1238 Fax (409) 772-5683 Pathology Report
FINAL AUTOPSY DIAGNOSIS Autopsy' Office (409)772-2858
Autopsy NO.: AU-97-00435
AUTOPSY INFORMATION: Occupation: Unknown Birthplace: Unknown Residence: Crystal Beach Date/Time of Death: 12/14/97 13:30 Date/Time of Autopsy: 12/15/97 15:00 Pathologist/Resident: Pencil/Fernandez Service: Private Restriction: Brain only
FINAL AUTOPSY DIAGNOSIS
I. Brain: Creutzfeldt-Jakob disease, Heidenhain variant.
snip...see full text ;
http://creutzfeldt-jakob-disease.blogspot.com/2008/07/heidenhain-variant-creutzfeldt-jakob.html
Monday, December 14, 2009
Similarities between Forms of Sheep Scrapie and Creutzfeldt-Jakob Disease Are Encoded by Distinct Prion Types
http://nor-98.blogspot.com/2009/12/similarities-between-forms-of-sheep.html
snip...
EVIDENCE OF SCRAPIE IN SHEEP AS A RESULT OF FOOD BORNE EXPOSURE
This is provided by the statistically significant increase in the incidence of sheep scrape from 1985, as determined from analyses of the submissions made to VI Centres, and from individual case and flock incident studies. ........
http://web.archive.org/web/20010305222246/www.bseinquiry.gov.uk/files/yb/1994/02/07002001.pdf
1: J Infect Dis 1980 Aug;142(2):205-8
Oral transmission of kuru, Creutzfeldt-Jakob disease, and scrapie to nonhuman primates.
Gibbs CJ Jr, Amyx HL, Bacote A, Masters CL, Gajdusek DC.
Kuru and Creutzfeldt-Jakob disease of humans and scrapie disease of sheep and goats were transmitted to squirrel monkeys (Saimiri sciureus) that were exposed to the infectious agents only by their nonforced consumption of known infectious tissues. The asymptomatic incubation period in the one monkey exposed to the virus of kuru was 36 months; that in the two monkeys exposed to the virus of Creutzfeldt-Jakob disease was 23 and 27 months, respectively; and that in the two monkeys exposed to the virus of scrapie was 25 and 32 months, respectively. Careful physical examination of the buccal cavities of all of the monkeys failed to reveal signs or oral lesions. One additional monkey similarly exposed to kuru has remained asymptomatic during the 39 months that it has been under observation.
snip...
The successful transmission of kuru, Creutzfeldt-Jakob disease, and scrapie by natural feeding to squirrel monkeys that we have reported provides further grounds for concern that scrapie-infected meat may occasionally give rise in humans to Creutzfeldt-Jakob disease.
PMID: 6997404
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6997404&dopt=Abstract
12/10/76 AGRICULTURAL RESEARCH COUNCIL REPORT OF THE ADVISORY COMMITTE ON SCRAPIE Office Note CHAIRMAN: PROFESSOR PETER WILDY
snip...
A The Present Position with respect to Scrapie A] The Problem Scrapie is a natural disease of sheep and goats. It is a slow and inexorably progressive degenerative disorder of the nervous system and it ia fatal. It is enzootic in the United Kingdom but not in all countries. The field problem has been reviewed by a MAFF working group (ARC 35/77). It is difficult to assess the incidence in Britain for a variety of reasons but the disease causes serious financial loss; it is estimated that it cost Swaledale breeders alone $l.7 M during the five years 1971-1975. A further inestimable loss arises from the closure of certain export markets, in particular those of the United States, to British sheep. It is clear that scrapie in sheep is important commercially and for that reason alone effective measures to control it should be devised as quickly as possible. Recently the question has again been brought up as to whether scrapie is transmissible to man. This has followed reports that the disease has been transmitted to primates.
One particularly lurid speculation (Gajdusek 1977) conjectures that the agents of scrapie, kuru, Creutzfeldt-Jakob disease and transmissible encephalopathy of mink are varieties of a single "virus". The U.S. Department of Agriculture concluded that it could "no longer justify or permit scrapie-blood line and scrapie-exposed sheep and goats to be processed for human or animal food at slaughter or rendering plants" (ARC 84/77)" The problem is emphasised by the finding that some strains of scrapie produce lesions identical to the once which characterise the human dementias" Whether true or not. the hypothesis that these agents might be transmissible to man raises two considerations. First, the safety of laboratory personnel requires prompt attention. Second, action such as the "scorched meat" policy of USDA makes the solution of the acrapie problem urgent if the sheep industry is not to suffer grievously.
snip...
76/10.12/4.6
http://web.archive.org/web/20010305223125/www.bseinquiry.gov.uk/files/yb/1976/10/12004001.pdf
Nature. 1972 Mar 10;236(5341):73-4.
Transmission of scrapie to the cynomolgus monkey (Macaca fascicularis).
Gibbs CJ Jr, Gajdusek DC. Nature 236, 73 - 74 (10 March 1972); doi:10.1038/236073a0
Transmission of Scrapie to the Cynomolgus Monkey (Macaca fascicularis)
C. J. GIBBS jun. & D. C. GAJDUSEK National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, Maryland
SCRAPIE has been transmitted to the cynomolgus, or crab-eating, monkey (Macaca fascicularis) with an incubation period of more than 5 yr from the time of intracerebral inoculation of scrapie-infected mouse brain. The animal developed a chronic central nervous system degeneration, with ataxia, tremor and myoclonus with associated severe scrapie-like pathology of intensive astroglial hypertrophy and proliferation, neuronal vacuolation and status spongiosus of grey matter. The strain of scrapie virus used was the eighth passage in Swiss mice (NIH) of a Compton strain of scrapie obtained as ninth intracerebral passage of the agent in goat brain, from Dr R. L. Chandler (ARC, Compton, Berkshire).
http://www.nature.com/nature/journal/v236/n5341/abs/236073a0.html
Epidemiology of Scrapie in the United States 1977
http://web.archive.org/web/20030513212324/http://www.bseinquiry.gov.uk/files/mb/m08b/tab64.pdf
Like lambs to the slaughter
31 March 2001
by Debora MacKenzie Magazine issue 2284
FOUR years ago, Terry Singeltary watched his mother die horribly from a degenerative brain disease. Doctors told him it was Alzheimer's, but Singeltary was suspicious. The diagnosis didn't fit her violent symptoms, and he demanded an autopsy. It showed she had died of sporadic Creutzfeldt-Jakob disease. Most doctors believe that sCJD is caused by a prion protein deforming by chance into a killer. But Singeltary thinks otherwise. He is one of a number of campaigners who say that some sCJD, like the variant CJD related to BSE, is caused by eating meat from infected animals. Their suspicions have focused on sheep carrying scrapie, a BSE-like disease that is widespread in flocks across Europe and North America. Now scientists in France have stumbled across new evidence that adds weight to the campaigners' fears. To their complete surprise, the researchers found that one strain of scrapie causes the same brain damage in ...
http://www.newscientist.com/article/mg16922840.300-like-lambs-to-the-slaughter.html
please see full text ;
Sunday, October 3, 2010
Scrapie, Nor-98 atypical Scrapie, and BSE in sheep and goats North America, who's looking ?
http://nor-98.blogspot.com/2010/10/scrapie-nor-98-atypical-scrapie-and-bse.html
Friday, August 27, 2010
NEW ATYPICAL NOR-98 SCRAPIE CASE DETECTED IDAHO NOW 5 CASES DOCUMENTED 2010
http://nor-98.blogspot.com/2010/08/new-atypical-nor-98-scrapie-case.html
Thursday, August 19, 2010
SCRAPIE CANADA UPDATE Current as of 2010-07-31 The following table lists sheep flocks and/or goat herds confirmed to be infected with scrapie in Canada in 2010.
Current as of: 2010-07-31
http://nor-98.blogspot.com/2010/08/scrapie-canada-update-current-as-of.html
Monday, December 14, 2009
Similarities between Forms of Sheep Scrapie and Creutzfeldt-Jakob Disease Are Encoded by Distinct Prion Types
http://nor-98.blogspot.com/2009/12/similarities-between-forms-of-sheep.html
Sunday, March 28, 2010
Nor-98 atypical Scrapie, atypical BSE, spontaneous TSE, trade policy, sound science ?
http://nor-98.blogspot.com/2010/03/nor-98-atypical-scrapie-atypical-bse.html
P03.141
Aspects of the Cerebellar Neuropathology in Nor98
Gavier-Widén, D1; Benestad, SL2; Ottander, L1; Westergren, E1 1National Veterinary Insitute, Sweden; 2National Veterinary Institute,
Norway Nor98 is a prion disease of old sheep and goats. This atypical form of scrapie was first described in Norway in 1998. Several features of Nor98 were shown to be different from classical scrapie including the distribution of disease associated prion protein (PrPd) accumulation in the brain. The cerebellum is generally the most affected brain area in Nor98. The study here presented aimed at adding information on the neuropathology in the cerebellum of Nor98 naturally affected sheep of various genotypes in Sweden and Norway. A panel of histochemical and immunohistochemical (IHC) stainings such as IHC for PrPd, synaptophysin, glial fibrillary acidic protein, amyloid, and cell markers for phagocytic cells were conducted. The type of histological lesions and tissue reactions were evaluated. The types of PrPd deposition were characterized. The cerebellar cortex was regularly affected, even though there was a variation in the severity of the lesions from case to case. Neuropil vacuolation was more marked in the molecular layer, but affected also the granular cell layer. There was a loss of granule cells. Punctate deposition of PrPd was characteristic. It was morphologically and in distribution identical with that of synaptophysin, suggesting that PrPd accumulates in the synaptic structures. PrPd was also observed in the granule cell layer and in the white matter. The pathology features of Nor98 in the cerebellum of the affected sheep showed similarities with those of sporadic Creutzfeldt-Jakob disease in humans.
***The pathology features of Nor98 in the cerebellum of the affected sheep showed similarities with those of sporadic Creutzfeldt-Jakob disease in humans.
http://www.prion2007.com/pdf/Prion%20Book%20of%20Abstracts.pdf
PR-26
NOR98 SHOWS MOLECULAR FEATURES REMINISCENT OF GSS
R. Nonno1, E. Esposito1, G. Vaccari1, E. Bandino2, M. Conte1, B. Chiappini1, S. Marcon1, M. Di Bari1, S.L. Benestad3, U. Agrimi1 1 Istituto Superiore di Sanità, Department of Food Safety and Veterinary Public Health, Rome, Italy (romolo.nonno@iss.it); 2 Istituto Zooprofilattico della Sardegna, Sassari, Italy; 3 National Veterinary Institute, Department of Pathology, Oslo, Norway
Molecular variants of PrPSc are being increasingly investigated in sheep scrapie and are generally referred to as "atypical" scrapie, as opposed to "classical scrapie". Among the atypical group, Nor98 seems to be the best identified. We studied the molecular properties of Italian and Norwegian Nor98 samples by WB analysis of brain homogenates, either untreated, digested with different concentrations of proteinase K, or subjected to enzymatic deglycosylation. The identity of PrP fragments was inferred by means of antibodies spanning the full PrP sequence. We found that undigested brain homogenates contain a Nor98-specific PrP fragment migrating at 11 kDa (PrP11), truncated at both the C-terminus and the N-terminus, and not N-glycosylated. After mild PK digestion, Nor98 displayed full-length PrP (FL-PrP) and N-glycosylated C-terminal fragments (CTF), along with increased levels of PrP11. Proteinase K digestion curves (0,006-6,4 mg/ml) showed that FL-PrP and CTF are mainly digested above 0,01 mg/ml, while PrP11 is not entirely digested even at the highest concentrations, similarly to PrP27-30 associated with classical scrapie. Above 0,2 mg/ml PK, most Nor98 samples showed only PrP11 and a fragment of 17 kDa with the same properties of PrP11, that was tentatively identified as a dimer of PrP11. Detergent solubility studies showed that PrP11 is insoluble in 2% sodium laurylsorcosine and is mainly produced from detergentsoluble, full-length PrPSc. Furthermore, among Italian scrapie isolates, we found that a sample with molecular and pathological properties consistent with Nor98 showed plaque-like deposits of PrPSc in the thalamus when the brain was analysed by PrPSc immunohistochemistry. Taken together, our results show that the distinctive pathological feature of Nor98 is a PrP fragment spanning amino acids ~ 90-155. This fragment is produced by successive N-terminal and C-terminal cleavages from a full-length and largely detergent-soluble PrPSc, is produced in vivo and is extremely resistant to PK digestion.
*** Intriguingly, these conclusions suggest that some pathological features of Nor98 are reminiscent of Gerstmann-Sträussler-Scheinker disease.
119
http://www.neuroprion.com/pdf_docs/conferences/prion2006/abstract_book.pdf
A newly identified type of scrapie agent can naturally infect sheep with resistant PrP genotypes
Annick Le Dur*,?, Vincent Béringue*,?, Olivier Andréoletti?, Fabienne Reine*, Thanh Lan Laï*, Thierry Baron§, Bjørn Bratberg¶, Jean-Luc Vilotte?, Pierre Sarradin**, Sylvie L. Benestad¶, and Hubert Laude*,?? +Author Affiliations
*Virologie Immunologie Moléculaires and ?Génétique Biochimique et Cytogénétique, Institut National de la Recherche Agronomique, 78350 Jouy-en-Josas, France; ?Unité Mixte de Recherche, Institut National de la Recherche Agronomique-Ecole Nationale Vétérinaire de Toulouse, Interactions Hôte Agent Pathogène, 31066 Toulouse, France; §Agence Française de Sécurité Sanitaire des Aliments, Unité Agents Transmissibles Non Conventionnels, 69364 Lyon, France; **Pathologie Infectieuse et Immunologie, Institut National de la Recherche Agronomique, 37380 Nouzilly, France; and ¶Department of Pathology, National Veterinary Institute, 0033 Oslo, Norway
***Edited by Stanley B. Prusiner, University of California, San Francisco, CA (received for review March 21, 2005)
Abstract Scrapie in small ruminants belongs to transmissible spongiform encephalopathies (TSEs), or prion diseases, a family of fatal neurodegenerative disorders that affect humans and animals and can transmit within and between species by ingestion or inoculation. Conversion of the host-encoded prion protein (PrP), normal cellular PrP (PrPc), into a misfolded form, abnormal PrP (PrPSc), plays a key role in TSE transmission and pathogenesis. The intensified surveillance of scrapie in the European Union, together with the improvement of PrPSc detection techniques, has led to the discovery of a growing number of so-called atypical scrapie cases. These include clinical Nor98 cases first identified in Norwegian sheep on the basis of unusual pathological and PrPSc molecular features and "cases" that produced discordant responses in the rapid tests currently applied to the large-scale random screening of slaughtered or fallen animals. Worryingly, a substantial proportion of such cases involved sheep with PrP genotypes known until now to confer natural resistance to conventional scrapie. Here we report that both Nor98 and discordant cases, including three sheep homozygous for the resistant PrPARR allele (A136R154R171), efficiently transmitted the disease to transgenic mice expressing ovine PrP, and that they shared unique biological and biochemical features upon propagation in mice. *** These observations support the view that a truly infectious TSE agent, unrecognized until recently, infects sheep and goat flocks and may have important implications in terms of scrapie control and public health.
http://www.pnas.org/content/102/44/16031.abstract
Monday, December 1, 2008
When Atypical Scrapie cross species barriers
Authors
Andreoletti O., Herva M. H., Cassard H., Espinosa J. C., Lacroux C., Simon S., Padilla D., Benestad S. L., Lantier F., Schelcher F., Grassi J., Torres, J. M., UMR INRA ENVT 1225, Ecole Nationale Veterinaire de Toulouse.France; ICISA-INlA, Madrid, Spain; CEA, IBiTec-5, DSV, CEA/Saclay, Gif sur Yvette cedex, France; National Veterinary Institute, Postboks 750 Sentrum, 0106 Oslo, Norway, INRA IASP, Centre INRA de Tours, 3738O Nouzilly, France.
Content
Atypical scrapie is a TSE occurring in small ruminants and harbouring peculiar clinical, epidemiological and biochemical properties. Currently this form of disease is identified in a large number of countries. In this study we report the transmission of an atypical scrapie isolate through different species barriers as modeled by transgenic mice (Tg) expressing different species PRP sequence.
The donor isolate was collected in 1995 in a French commercial sheep flock. inoculation into AHQ/AHQ sheep induced a disease which had all neuro-pathological and biochemical characteristics of atypical scrapie. Transmitted into Transgenic mice expressing either ovine or PrPc, the isolate retained all the described characteristics of atypical scrapie.
Surprisingly the TSE agent characteristics were dramatically different v/hen passaged into Tg bovine mice. The recovered TSE agent had biological and biochemical characteristics similar to those of atypical BSE L in the same mouse model. Moreover, whereas no other TSE agent than BSE were shown to transmit into Tg porcine mice, atypical scrapie was able to develop into this model, albeit with low attack rate on first passage.
Furthermore, after adaptation in the porcine mouse model this prion showed similar biological and biochemical characteristics than BSE adapted to this porcine mouse model. Altogether these data indicate.
(i) the unsuspected potential abilities of atypical scrapie to cross species barriers
(ii) the possible capacity of this agent to acquire new characteristics when crossing species barrier
These findings raise some interrogation on the concept of TSE strain and on the origin of the diversity of the TSE agents and could have consequences on field TSE control measures.
http://www.neuroprion.org/resources/pdf_docs/conferences/prion2008/abstract-book-prion2008.pdf
$$$
Monday, November 30, 2009
USDA AND OIE COLLABORATE TO EXCLUDE ATYPICAL SCRAPIE NOR-98 ANIMAL HEALTH CODE
http://nor-98.blogspot.com/2009/11/usda-and-oie-collaborate-to-exclude.html
Thursday, November 18, 2010
UNITED STATES OF AMERICA VS GALEN J. NIEHUES FAKED MAD COW FEED TEST ON 92 BSE INSPECTION REPORTS FOR APPROXIMATELY 100 CATTLE OPERATIONS
http://bse-atypical.blogspot.com/2010/11/united-states-of-america-vs-galen-j.html
Wednesday, November 17, 2010
MAD COW TESTING FAKED IN USA BY Nebraska INSPECTOR Senator Mike Johanns STATE
http://madcowtesting.blogspot.com/2010/11/mad-cow-testing-faked-in-usa-by.html
Tuesday, November 02, 2010
IN CONFIDENCE
The information contained herein should not be disseminated further except on the basis of "NEED TO KNOW".
BSE - ATYPICAL LESION DISTRIBUTION (RBSE 92-21367) statutory (obex only) diagnostic criteria CVL 1992
http://bse-atypical.blogspot.com/2010/11/bse-atypical-lesion-distribution-rbse.html
Seven main threats for the future linked to prions
The NeuroPrion network has identified seven main threats for the future linked to prions.
First threat
The TSE road map defining the evolution of European policy for protection against prion diseases is based on a certain numbers of hypotheses some of which may turn out to be erroneous. In particular, a form of BSE (called atypical Bovine Spongiform Encephalopathy), recently identified by systematic testing in aged cattle without clinical signs, may be the origin of classical BSE and thus potentially constitute a reservoir, which may be impossible to eradicate if a sporadic origin is confirmed.
*** Also, a link is suspected between atypical BSE and some apparently sporadic cases of Creutzfeldt-Jakob disease in humans. These atypical BSE cases constitute an unforeseen first threat that could sharply modify the European approach to prion diseases.
Second threat
In small ruminants, a new atypical form of scrapie currently represents up to 50% of detected cases and even involves sheep selected for resistance to classical scrapie. The consequences for animal and human health are still unknown and there may be a potential connection with atypical BSE. These atypical scrapie cases constitute a second threat not envisioned previously which could deeply modify the European approach to prion diseases.
Third threat
The species barrier between human and cattle might be weaker than previously expected and the risk of transmission of prion diseases between different species has been notoriously unpredictable. The emergence of new atypical strains in cattle and sheep together with the spread of chronic wasting disease in cervids renders the understanding of the species barrier critical. This constitutes a third threat not properly envisioned previously that could deeply modify the European approach to prion diseases.
Fourth threat
Prion infectivity has now been detected in blood, urine and milk and this has potential consequences on risk assessments for the environment and food as well as for contamination of surfaces including medical instruments. Furthermore the procedures recommended for decontamination of MBM (Meat and Bone Meal), which are based on older methodologies not designed for this purpose, have turned out to be of very limited efficacy and compromise current policies concerning the reuse of these high value protein supplements (cross-contamination of feed circuits are difficult to control). It should be noted that the destruction or very limited use of MBM is estimated to still cost 1 billion euros per year to the European economy,
whereas other countries, including the US,
Brazil, and Argentine do not have these constraints.
However, many uncertainties remain concerning the guarantees that can be reasonably provided for food and feed safety and scientific knowledge about the causative agents (prions) will continue to evolve. This decontamination and environmental issue is a fourth threat that could modify deeply the European approach to prion diseases.
Fifth threat The precise nature of prions remains elusive. Very recent data indicate that abnormal prion protein (PrPTSE) can be generated from the brains of normal animals, and under some conditions (including contaminated waste water) PrPTSE can be destroyed whereas the BSE infectious titre remains almost unchanged, a finding that underlines the possibility of having BSE without any detectable diagnostic marker. These are just two areas of our incomplete knowledge of the fundamental biology of prions which constitute a fifth threat to the European approach to prion diseases.
Sixth threat The absence of common methods and standardisation in the evaluation of multiple in vivo models with different prion strains and different transgenic mice expressing PrP from different species (different genotypes of cattle, sheep, cervids, etc) renders a complete and comprehensive analysis of all the data generated by the different scientific groups almost impossible. This deeply impairs risk assessment. Moreover, the possibility of generating PrPTSE de novo with new powerful techniques has raised serious questions about their appropriateness for use as blood screening tests. The confusion about an incorrect interpretation of positive results obtained by these methods constitutes a sixth threat to European approach to prion diseases.
Seventh Threat The detection of new or re-emerging prion diseases in animals or humans which could lead to a new crisis in consumer confidence over the relaxation of precautionary measures and surveillance programmes constitutes a seventh threat that could modify the European approach to prion diseases.
http://www.neuroprion.org/en/np-neuroprion.html
Thursday, August 12, 2010
Seven main threats for the future linked to prions
http://prionpathy.blogspot.com/2010/08/seven-main-threats-for-future-linked-to.html
http://prionpathy.blogspot.com/
Rural and Regional Affairs and Transport References Committee The possible impacts and consequences for public health, trade and agriculture of the Government’s decision to relax import restrictions on beef Final report June 2010
2.65 At its hearing on 14 May 2010, the committee heard evidence from Dr Alan Fahey who has recently submitted a thesis on the clinical neuropsychiatric, epidemiological and diagnostic features of Creutzfeldt-Jakob disease.48 Dr Fahey told the committee of his concerns regarding the lengthy incubation period for transmissible spongiform encephalopathies, the inadequacy of current tests and the limited nature of our current understanding of this group of diseases.49
2.66 Dr Fahey also told the committee that in the last two years a link has been established between forms of atypical CJD and atypical BSE. Dr Fahey said that: They now believe that those atypical BSEs overseas are in fact causing sporadic Creutzfeldt-Jakob disease. They were not sure if it was due to mad sheep disease or a different form. If you look in the textbooks it looks like this is just arising by itself. But in my research I have a summary of a document which states that there has never been any proof that sporadic Creutzfeldt-Jakob disease has arisen de novo—has arisen of itself. There is no proof of that. The recent research is that in fact it is due to atypical forms of mad cow disease which have been found across Europe, have been found in America and have been found in Asia. These atypical forms of mad cow disease typically have even longer incubation periods than the classical mad cow disease.50
http://www.aph.gov.au/senate/committee/rrat_ctte/mad_cows/report/report.pdf
PLEASE SEE FULL TEXT ;
Sunday, October 3, 2010
Scrapie, Nor-98 atypical Scrapie, and BSE in sheep and goats North America, who's looking ?
http://nor-98.blogspot.com/2010/10/scrapie-nor-98-atypical-scrapie-and-bse.html
ALABAMA MAD COW g-h-BSEalabama
In this study, we identified a novel mutation in the bovine prion protein gene (Prnp), called E211K, of a confirmed BSE positive cow from Alabama, United States of America. This mutation is identical to the E200K pathogenic mutation found in humans with a genetic form of CJD. This finding represents the first report of a confirmed case of BSE with a potential pathogenic mutation within the bovine Prnp gene. We hypothesize that the bovine Prnp E211K mutation most likely has caused BSE in "the approximately 10-year-old cow" carrying the E221K mutation.
http://www.plospathogens.org/article/info%3Adoi%2F10.1371%2Fjournal.ppat.1000156
http://www.plospathogens.org/article/fetchObjectAttachment.action?uri=info%3Adoi%2F10.1371%2Fjournal.ppat.1000156&representation=PDF
Saturday, August 14, 2010
BSE Case Associated with Prion Protein Gene Mutation (g-h-BSEalabama) and VPSPr PRIONPATHY
(see mad cow feed in COMMERCE IN ALABAMA...TSS)
http://prionpathy.blogspot.com/2010/08/bse-case-associated-with-prion-protein.html
Wednesday, July 28, 2010
re-Freedom of Information Act Project Number 3625-32000-086-05, Study of Atypical BSE UPDATE July 28, 2010
http://bse-atypical.blogspot.com/2010/07/re-freedom-of-information-act-project.html
Monday, August 9, 2010
Variably protease-sensitive prionopathy: A new sporadic disease of the prion protein or just more PRIONBALONEY ?
http://prionunitusaupdate2008.blogspot.com/2010/08/variably-protease-sensitive-prionopathy.html
PLEASE SEE the dramatic increase in sporadic CJD cases in documented BSE countries, then think, BSE can propagate as nvCJD and sporadic CJD in the lab ;
TOTAL CASES OF SPORADIC CJD (DEATHS) DEFINITE AND PROBABLE CASES
Australia Austria Canada France Germany Italy Netherlands Slovakia Spain Switzerland UK
http://www.eurocjd.ed.ac.uk/sporadic.htm
USA
5 Includes 16 cases in which the diagnosis is pending, and 18 inconclusive cases;
6 Includes 21 (19 from 2010) cases with type determination pending in which the diagnosis of vCJD has been excluded.
2010
PLEASE NOTE REFERENCE LINES 5. AND 6.
Monday, August 9, 2010
National Prion Disease Pathology Surveillance Center Cases Examined (July 31, 2010) Year Total Referrals2 Prion Disease Sporadic Familial Iatrogenic vCJD
1996 & earlier 51 33 28 5 0 0
1997 114 68 59 9 0 0
1998 88 52 44 7 1 0
1999 120 72 64 8 0 0
2000 146 103 89 14 0 0
2001 209 119 109 10 0 0
2002 248 149 125 22 2 0
2003 274 176 137 39 0 0
2004 325 186 164 21 0 1(3)
2005 344 194 157 36 1 0
2006 383 197 166 29 0 2(4)
2007 377 214 187 27 0 0
2008 394 231 204 25 0 0
2009 425 259 216 43 0 0
2010 204 124 85 20 0 0
TOTAL 3702(5) 2177(6) 1834 315 4 3
1 Listed based on the year of death or, if not available, on year of referral;
2 Cases with suspected prion disease for which brain tissue and/or blood (in familial cases) were submitted;
3 Disease acquired in the United Kingdom;
4 Disease was acquired in the United Kingdom in one case and in Saudi Arabia in the other case;
5 Includes 16 cases in which the diagnosis is pending, and 18 inconclusive cases;
6 Includes 21 (19 from 2010) cases with type determination pending in which the diagnosis of vCJD has been excluded.
http://www.cjdsurveillance.com/pdf/case-table.pdf
Monday, August 9, 2010
National Prion Disease Pathology Surveillance Center Cases Examined (July 31, 2010)
(please watch and listen to the video and the scientist speaking about atypical BSE and sporadic CJD and listen to Professor Aguzzi)
http://prionunitusaupdate2008.blogspot.com/2010/08/national-prion-disease-pathology.html
Atypical BSE in Cattle
BSE has been linked to the human disease variant Creutzfeldt Jakob Disease (vCJD). The known exposure pathways for humans contracting vCJD are through the consumption of beef and beef products contaminated by the BSE agent and through blood transfusions. However, recent scientific evidence suggests that the BSE agent may play a role in the development of other forms of human prion diseases as well. These studies suggest that classical type of BSE may cause type 2 sporadic CJD and that H-type atypical BSE is connected with a familial form of CJD.
To date the OIE/WAHO assumes that the human and animal health standards set out in the BSE chapter for classical BSE (C-Type) applies to all forms of BSE which include the H-type and L-type atypical forms. This assumption is scientifically not completely justified and accumulating evidence suggests that this may in fact not be the case. Molecular characterization and the spatial distribution pattern of histopathologic lesions and immunohistochemistry (IHC) signals are used to identify and characterize atypical BSE. Both the L-type and H-type atypical cases display significant differences in the conformation and spatial accumulation of the disease associated prion protein (PrPSc) in brains of afflicted cattle. Transmission studies in bovine transgenic and wild type mouse models support that the atypical BSE types might be unique strains because they have different incubation times and lesion profiles when compared to C-type BSE. When L-type BSE was inoculated into ovine transgenic mice and Syrian hamster the resulting molecular fingerprint had changed, either in the first or a subsequent passage, from L-type into C-type BSE. In addition, non-human primates are specifically susceptible for atypical BSE as demonstrated by an approximately 50% shortened incubation time for L-type BSE as compared to C-type. Considering the current scientific information available, it cannot be assumed that these different BSE types pose the same human health risks as C-type BSE or that these risks are mitigated by the same protective measures.
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http://www.prionetcanada.ca/detail.aspx?menu=5&dt=293380&app=93&cat1=387&tp=20&lk=no&cat2
14th ICID International Scientific Exchange Brochure -
Final Abstract Number: ISE.114
Session: International Scientific Exchange
Transmissible Spongiform encephalopathy (TSE) animal and human TSE in North America update October 2009
T. Singeltary
Bacliff, TX, USA
Background:
An update on atypical BSE and other TSE in North America. Please remember, the typical U.K. c-BSE, the atypical l-BSE (BASE), and h-BSE have all been documented in North America, along with the typical scrapie's, and atypical Nor-98 Scrapie, and to date, 2 different strains of CWD, and also TME. All these TSE in different species have been rendered and fed to food producing animals for humans and animals in North America (TSE in cats and dogs ?), and that the trading of these TSEs via animals and products via the USA and Canada has been immense over the years, decades.
Methods:
12 years independent research of available data
Results:
I propose that the current diagnostic criteria for human TSEs only enhances and helps the spreading of human TSE from the continued belief of the UKBSEnvCJD only theory in 2009. With all the science to date refuting it, to continue to validate this old myth, will only spread this TSE agent through a multitude of potential routes and sources i.e. consumption, medical i.e., surgical, blood, dental, endoscopy, optical, nutritional supplements, cosmetics etc.
Conclusion:
I would like to submit a review of past CJD surveillance in the USA, and the urgent need to make all human TSE in the USA a reportable disease, in every state, of every age group, and to make this mandatory immediately without further delay. The ramifications of not doing so will only allow this agent to spread further in the medical, dental, surgical arena's. Restricting the reporting of CJD and or any human TSE is NOT scientific. Iatrogenic CJD knows NO age group, TSE knows no boundaries. I propose as with Aguzzi, Asante, Collinge, Caughey, Deslys, Dormont, Gibbs, Gajdusek, Ironside, Manuelidis, Marsh, et al and many more, that the world of TSE Transmissible Spongiform Encephalopathy is far from an exact science, but there is enough proven science to date that this myth should be put to rest once and for all, and that we move forward with a new classification for human and animal TSE that would properly identify the infected species, the source species, and then the route.
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http://ww2.isid.org/Downloads/14th_ICID_ISE_Abstracts.pdf
The EMBO Journal (2002) 21, 6358 - 6366 doi:10.1093/emboj/cdf653
BSE prions propagate as either variant CJD-like or sporadic CJD-like prion strains in transgenic mice expressing human prion protein
Emmanuel A. Asante1, Jacqueline M. Linehan1, Melanie Desbruslais1, Susan Joiner1, Ian Gowland1, Andrew L. Wood1, Julie Welch1, Andrew F. Hill1, Sarah E. Lloyd1, Jonathan D.F. Wadsworth1 and John Collinge1
1.MRC Prion Unit and Department of Neurodegenerative Disease, Institute of Neurology, University College, Queen Square, London WC1N 3BG, UK Correspondence to:
John Collinge, E-mail: j.collinge@prion.ucl.ac.uk
Received 1 August 2002; Accepted 17 October 2002; Revised 24 September 2002
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Abstract
Variant Creutzfeldt–Jakob disease (vCJD) has been recognized to date only in individuals homozygous for methionine at PRNP codon 129. Here we show that transgenic mice expressing human PrP methionine 129, inoculated with either bovine spongiform encephalopathy (BSE) or variant CJD prions, may develop the neuropathological and molecular phenotype of vCJD, consistent with these diseases being caused by the same prion strain. Surprisingly, however, BSE transmission to these transgenic mice, in addition to producing a vCJD-like phenotype, can also result in a distinct molecular phenotype that is indistinguishable from that of sporadic CJD with PrPSc type 2. These data suggest that more than one BSE-derived prion strain might infect humans; it is therefore possible that some patients with a phenotype consistent with sporadic CJD may have a disease arising from BSE exposure.
Keywords:BSE, Creutzfeldt–Jakob disease, prion, transgenic
http://www.nature.com/emboj/journal/v21/n23/abs/7594869a.html
BSE prions propagate as either variant CJD-like or sporadic CJD-like prion strains in transgenic mice expressing human prion protein
Emmanuel A. Asante, Jacqueline M. Linehan, Melanie Desbruslais, Susan Joiner, Ian Gowland, Andrew L. Wood, Julie Welch, Andrew F. Hill, Sarah E. Lloyd, Jonathan D.F. Wadsworth, and John Collinge1 MRC Prion Unit and Department of Neurodegenerative Disease, Institute of Neurology, University College, Queen Square, London WC1N 3BG, UK 1Corresponding author e-mail: j.collinge@prion.ucl.ac.uk
Received August 1, 2002; Revised September 24, 2002; Accepted October 17, 2002.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC136957/?tool=pubmed
TSS