Mad cow disease discovered in California animal, but food supply declared safe

Mad cow disease discovered in California animal, but food supply declared safe:
The first American case of mad cow disease since 2006 was found this week in a dairy cow in California, but the animal had not been slaughtered for food, government officials said.
Known formally as bovine spongiform encephalopathy, or BSE, the infection decimated English cattle herds in the 1980s and 1990s. It was also linked to about 225 cases worldwide of a fatal human brain aliment known as variant Creutzfeldt-Jakob disease.
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