The U.S.D.A. will not release where the cow was from, but it was the same cow that was tested in November and found negative for BSE, or mad cow disease.
Now another test on the same cow has come back positive.
The cow is older with known health issues and was therefore seen as high-risk.
Kathleen Hawkins of the Michigan Beef Industry Commission says there is no risk for humans at this time because this cow never entered the food chain. She also says this is a good sign that the screening system in place is working.
Samples of the cow in question were sent to England for further, more precise testing. Results are expected within two weeks.
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