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From: TSS ()
Subject: Summary of SEAC discussion of vertebral column: age at which SRM
Date: May 27, 2005 at 6:40 am PST

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

Summary of SEAC discussion of vertebral column: age at which

specified risk material

SEAC 87. April 21st 2005

The Food Standards Agency asked the UK Spongiform Encephalopathy

Advisory Committee (SEAC) to review an assessment of the BSE

exposure risk from vertebral column1. This risk assessment quantified

the infectivity predicted to enter the human food chain over a year as a

result of making vertebral column specified risk material (SRM) at the

age of 12 months instead of 30 months.

SEAC was content with the approach used and assumptions made in

the risk assessment. The committee noted that some uncertainties

remained with regard to the extent of the species barrier between cattle

and human. Nevertheless, even using the most pessimistic assumption

(ie. low species barrier), the overall conclusions would not be

significantly altered. It was also noted that the assessment included a

pessimistic assumption about the levels of infectivity entering the food

chain from residual dorsal root ganglia associated with vertebral

column.

The committee considered that the human health risk from vertebral

column in under thirty month cattle was now very small. The difference

in risk from vertebral column as SRM at 12 as opposed to 30 months of

age was negligible. It was noted that average risks were calculated for

the entire UK population. The risks to any subpopulation consuming

large amounts of UK beef on the had not been specifically considered.

Data on specific groups who might consume significant amounts of beef

on the bone were not available. Nevertheless, although exposure

would be higher in any such group than assumed in the assessment, it

was considered that the risk to this population group is still likely to be

very small.

1 DNV Consulting (2005). Assessment of Risk from Under Thirty Month Beef-on-the Bone: Report for

the Food Standards Agency.

In summary, the human health risk from vertebral column in under thirty

month cattle is now very low, and the difference in risk from vertebral

column as SRM from 30 months or 12 months is very small, verging on

negligible, even for any subgroup of individuals who may consume

much of the current supply of beef on the bone.

http://www.seac.gov.uk/pdf/arm-210405.pdf

26 May 2005 - Draft minutes from the 87th SEAC meeting held on 21st April are now available

http://www.seac.gov.uk/papers/papers.htm

TSS

#################### https://lists.aegee.org/bse-l.html ####################




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