December 2003: The first official case of mad cow disease in the US was announced in Washington State USDA announced that the cow was from Canada Mad mink inoculations from the 1990s occurred 12 miles from the location of this case USDA recalled beef in many western states and announced restrictions regarding the contents of ground beef A 2003 USDA survey found that 35% of randomly sampled ground beef contained unacceptable level of brain tissue Richard Marsh and other BSE experts were finally given credit and taken seriously
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