title: Review of the origin of BSE: scrapie agent cannot be excluded.
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle; D003937:Diagnosis, Differential; D016643:Encephalopathy, Bovine Spongiform / Q000453:epidemiology / Q000209:etiology*; D018620:PrPSc Proteins / Q000472:pathogenicity*; D012756:Sheep; D006113:United Kingdom / Q000453:epidemiology
chemical_list: D018620:PrPSc Proteins