OTTAWA — Yet another case of bovine spongiform encephalopathy (B.S.E.) has been identified in a six-year-old beef cow from Alberta. The Canadian Food Inspection Agency (C.F.I.A.) said the animal’s birth farm has been identified and an investigation is under way.

As with past investigations, the C.F.I.A. is tracing the animal’s herd mates at the time of birth and looking for possible sources of infection. The case was detected through Canada’s national B.S.E. surveillance program.

The case is the second this summer. In late June, the C.F.I.A. identified a case of B.S.E. in a five-year-old Holstein cow in British Columbia.