Canada has confirmed a case of mad cow disease in a six-year-old beef cow, marking the 14th instance of the disease since the country's first case in 2003.
There was no risk to public health because no part of the animal entered the human food systems, the Canadian Food inspection agency said.
The agency said it is tracing other cattle in the herd and trying to determine how the cow became infected. The new case should not affect exports of Canadian cattle or beef, the agency said.
Mad cow disease, medically known as bovine spongiform encephalopathy, or BSE, causes spongy holes in the brain.
Among humans, a rare but fatal form of the disease called variant Creutzfeldt-Jakob disease has been linked to eating infected tissue from cows.
The agency has said a ban on using animal materials in feed products has virtually eliminated the spread of BSE in Canada, but it said a small number of cases are still expected to surface.