Contaminated feed heightens "mad cow" fears in the United States.
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D000821:Animal Feed; D000818:Animals; D001007:Anxiety / Q000523:psychology*; D002417:Cattle; D016643:Encephalopathy, Bovine Spongiform / Q000523:psychology*; D005506:Food Contamination; D006801:Humans; D014481:United States; D016885:United States Department of Agriculture; D014486:United States Food and Drug Administration