A California cow has tested positive for bovine spongiform encephalopathy (BSE) or “mad cow disease”. But before you start refusing all American beef products take note, that brings the total of cows testing positive to 4 and it is the first case since 2006.
Since the major outbreak of BSE in the UK in the 1990s animals are tested for the disease and the parts of the animal that can transmit the disease, such as brain and spinal cord are removed before the meat enters the food chain. And every positive test proves the installed testing system effective. In 2011, there were only 29 worldwide cases of BSE detected.