BSE contracted from feed supply
A dairy cow that was recently diagnosed in Canada with mad cow disease probably contracted the disease from contaminated feed, federal regulators said.
The finding by the Canadian Food Inspection
Agency
came after an enforcement investigation was launched because
the 50-month-old animal from an Edmonton-area farm was exposed to bovine
spongiform encephalopathy after a 1997 feed ban was imposed.
The agency tracked roughly 170
cows that originated at the same farm as the infected dairy cow. An expanded
investigation located 38 live animals on the farm and in other herds to which
they had been sold. Most of those animals have been destroyed and their
carcasses burned. Eight animals were determined to be untraceable because of
inadequate records. The infected dairy cow did not die of BSE and no part of its
carcass entered the human or animal food chain.
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