61-month-old Holstein cow from a dairy operation in British
Columbia that was Canada's 13th case of bovine
spongiform encephalopathy likely contracted the disease from commercial feed,
according to a report by the Canadian Food Inspection Agency.
The animal was destroyed in early June, and no part of the carcass entered
the human food supply.
CFIA's investigation of the case focused on both
animals at the farm in question as well as feed products there to which the
BSE case animal had access. It found that while all feed products the animal
was exposed to were intended for feeding to ruminants, some of the farm's
feed suppliers used prohibited material in preparing rations for non-ruminant
species and could have caused the BSE infection.
implemented a ruminant feed ban in 1997 that bans the use of certain animal
products, known as prohibited material, in the manufacture of ruminant feed.
The report noted that the detection of this case does not change any of Canada's BSE
risk parameters. The World Organization for Animal Health categorizes Canada as a
controlled risk BSE country.