25 April 2012
The U.S. Department of Agriculture (USDA) has announced it had identified a cow suffering from mad cow disease, or bovine spongiform encephalopathy (BSE); this is the fourth case of mad cow disease found in the United States since 2003, and the first since 2006.
The latest case was found in a cow from a dairy herd in central California. The USDA says that the discovery is not likely to affect the safety of U.S. beef supplies. No meat from the diseased cow has entered the U.S. food supply.
The animal carcass is kept in a rendering plant in California. Samples from the carcass were analyzed by the USDA National Veterinary Service Laboratories in Ames, Iowa. The lab tests samples from about 40,000 cows a year....
Much more here.