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From: TSS ()
Subject: Re: JAPAN AWAITS BSE TEST RESULTS ON 20-MONTH-OLD STEER
Date: April 17, 2006 at 8:27 am PST

In Reply to: JAPAN AWAITS BSE TEST RESULTS ON 20-MONTH-OLD STEER posted by TSS on April 17, 2006 at 6:38 am:

The implications of the Swiss result for Britain, which has had the
most BSE, are complex. Only cattle aged 30 months or younger are eaten
in Britain, on the assumption, based on feeding trials, that cattle of
that age, even if they were infected as calves, have not yet
accumulated enough prions to be infectious. But the youngest cow to
develop BSE on record in Britain was 20 months old, showing some are
fast incubators. Models predict that 200-300 cattle under 30 months
per year are infected with BSE and enter the food chain currently in
Britain. Of these 3-5 could be fast incubators and carrying detectable
quantities of prion.


If one were to test cattle routinely at abattoirs in Britain, it is
possible that only those 3-5 would be detectable, and thus could be
kept out of the food chain. So routine testing may not be
cost-effective. On the other hand, these predictions are based
entirely on modelling. Some think that at least a study similar to the
Swiss one should be carried out in Britain to actually measure the
extent of infection, especially if there is a subclinical strain that
is not reflected in models based on clinical incidence.

snip...


http://www.sare.org/sanet-mg/archives/html-home/28-html/0359.html


https://web01.aphis.usda.gov/BSEcom.nsf/0/b78ba677e2b0c12185256dd300649f9d?OpenDocument&AutoFramed


TSS




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