title: Mad cows cast long shadows.
mesh_terms: D000383:Agriculture; D000818:Animals; D002417:Cattle; D004196:Disease Outbreaks; D016643:Encephalopathy, Bovine Spongiform / Q000453:epidemiology; D006076:Government; D017408:Guidelines as Topic; D006291:Health Policy; D006801:Humans; D012756:Sheep; D006113:United Kingdom / Q000453:epidemiology