SEARCH VEGSOURCE:

 

 

Follow Ups | Post Followup | Back to Discussion Board | VegSource
See spam or
inappropriate posts?
Please let us know.
  




From: TSS (216-119-143-165.ipset23.wt.net)
Subject: 'ATYPICAL' CASES OF SCRAPIE - AN UPDATE
Date: December 7, 2004 at 9:00 am PST

-------- Original Message --------
Subject: 'ATYPICAL' CASES OF SCRAPIE - AN UPDATE
Date: Tue, 7 Dec 2004 08:37:31 -0600
From: "Terry S. Singeltary Sr."
Reply-To: Bovine Spongiform Encephalopathy
To: BSE-L@LISTSERV.KALIV.UNI-KARLSRUHE.DE


##################### Bovine Spongiform Encephalopathy #####################

Date: December 07, 2004 Time: 13:45

'ATYPICAL' CASES OF SCRAPIE - AN UPDATE

The Veterinary Laboratories Agency (VLA) has detected a type of scrapie
not previously reported in Great Britain. The finding was made during a
survey of abattoir and fallen stock samples.

The VLA recognised the possibility of 'atypical' cases of scrapie last
year when scientists detected a small number of samples that produced
contradictory results when tested with different methods.

Further investigations have now confirmed the presence of this
'atypical' scrapie and shown that there are no similarities with BSE
from experimentally challenged sheep.

To date the VLA has detected 83 'atypical' cases out of 110,000 samples
tested. Of these, 12 were from sheep of the genotypes usually associated
with the greatest resistance to scrapie.

Despite the confirmation of these cases Defra is stressing that the
National Scrapie Plan will continue. The Plan, which has been running
for 3 years, breeds out scrapie-susceptible genes in the national flock
and is part of EU wide measures.

It has been previously acknowledged that the most scrapie resistant
genotype may not be fully resistant to infection. However, no cases of
clinically affected sheep have been found in such genotypes so far,
which may indicate that they are resistant to clinical disease.

Other European Countries have reported similar 'atypical' scrapie
findings through their own programmes of scrapie surveillance.

EU-wide rules apply on farms with confirmed scrapie cases. Sheep flocks
on these farms have to be genotyped so that the more scrapie-susceptible
sheep can be identified and removed, or the whole flock may be disposed of.

The Commission will be reviewing the measures to apply in these
'atypical' cases.

Notes for editors

1. Scrapie is a fatal neurological sheep disease belonging to a group of
diseases called transmissible spongiform encephalopathies (TSEs),
including BSE in cattle and CJD in humans. It has been present in the
national flock for over 250 years. It is not considered to be
transmissible to humans.

2. There is a theoretical risk that BSE could be present in sheep,
masked by scrapie, but it has not been found naturally occurring in
sheep. There is no indication that the 'atypical' cases of scrapie are BSE.

3. All the samples analysed are from the GB abattoir and fallen stock
survey. The samples have not come from sheep showing clinical signs of
scrapie.

4. Defra Press release 371 of 11 September 2003 first reported the
emergence of these atypical cases
http://www.defra.gov.uk/news/2003/030911a.htm

5. The full report - Scrapie Surveillance in Great Britain: January 2002
- March 2003 can be accessed at:
http://www.defra.gov.uk.animalh/bse/animal-health/bsetest.html#sheep

6. Further information on scrapie, genotyping, and the National Scrapie
Plan can be found at www.defra.gov.uk/nsp

7. The advice of the Spongiform Encephalopathy Advisory Committee (SEAC)
will be sought in the near future.

Public enquiries 08459 335577;
Press notices are available on our website www.defra.gov.uk Defra's aim
is sustainable development

Nobel House
17 Smith Square
London SW1P 3JR

TSS

############## BSE-L-subscribe-request@kaliv.uni-karlsruhe.de ##############






Follow Ups:



Post a Followup

Name:
E-mail: (optional)
Subject:

Comments:

Optional Link URL:
Link Title:
Optional Image URL: