New case of "mad cow" disease in California
The first new case of mad cow disease in the US since 2006 has been discovered in a dairy cow in California, but health authorities said the animal never posed a threat to the nation's food supply. The infected cow, the fourth ever discovered in the US, was found as part of an Agriculture Department surveillance program that tests about 40,000 cows a year for the fatal brain disease. No meat from the cow was bound for the food supply, said John Clifford, the department's chief veterinary officer.