title: DEFRA considers 'worst case scenario' in its contingency plan for BSE in sheep.
mesh_terms: D000818:Animals; D002417:Cattle; D016643:Encephalopathy, Bovine Spongiform / Q000517:prevention & control*; D006077:Government Agencies; D011314:Preventive Health Services / Q000458:organization & administration*; D012756:Sheep; D012757:Sheep Diseases / Q000635:transmission*; D006113:United Kingdom