Can it happen here? The puzzle of mad cow disease.
D000818:Animals; D002417:Cattle; D018562:Disease Transmission, Infectious; D005399:Fishes; D006801:Humans; D008460:Meat; D017096:Prion Diseases / Q000209:etiology / Q000517:prevention & control; D013552:Swine; D006113:United Kingdom; D014481:United States; D014486:United States Food and Drug Administration