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VANCOUVER, British Columbia (Reuters) - The search for cattle connected by birth or sources of feed with Canada's latest mad cow case has ended and all tests so far have been negative, officials said on Monday.
The Canadian Food Inspection Agency said it has tested 12 cattle potentially exposed to the same feed as a six-year-old dairy cow found with the disease last month in British Columbia, and 11 more will be tested shortly.
The 23 cattle were among 146 identified as "feed cohorts" or as offspring of the affected cow, and CFIA said in a statement that "the investigation of animals of interest has been concluded."
Of the 146 cattle, 74 were already dead, 15 had been exported to the United States and 34 were deemed untraceable due to a lack of information.
"Thirty-four untraceable animals out of 146 is not an unusual rate for investigations of this type," CFIA said in a press release.
CFIA said the investigation into the sources of the diseased cows feed sources continues.
The Holstein cow discovered last month was Canada's fifth native-born case of the brain-wasting bovine spongiform encephalopathy disease, but the animal did not enter the human food chain.
The Canadian Food Inspection Agency said it has tested 12 cattle potentially exposed to the same feed as a six-year-old dairy cow found with the disease last month in British Columbia, and 11 more will be tested shortly.
The 23 cattle were among 146 identified as "feed cohorts" or as offspring of the affected cow, and CFIA said in a statement that "the investigation of animals of interest has been concluded."
Of the 146 cattle, 74 were already dead, 15 had been exported to the United States and 34 were deemed untraceable due to a lack of information.
"Thirty-four untraceable animals out of 146 is not an unusual rate for investigations of this type," CFIA said in a press release.
CFIA said the investigation into the sources of the diseased cows feed sources continues.
The Holstein cow discovered last month was Canada's fifth native-born case of the brain-wasting bovine spongiform encephalopathy disease, but the animal did not enter the human food chain.
