The carcass of a BSE-infected cow being burnt in a Dorset field. BSE (bovine spongiform encephal- opathy),or "mad cow" disease,progressively destroys the brains of infected cattle. The disease first appeared around 1985 and,so far,has only been identified in Britain. It is thought to have arisen from a similar disease,scrapie,which infects sheep and to have been transmitted to cattle via processed feed containing infected sheep carcasses. The infective agent responsible for BSE is not a virus or bacterium,but a virus- like protein known as a prion. Similar diseases affecting humans include Kuru,Creutzfeldt- Jakob disease & Gerstmann-Straussler syndrome | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Stammers, Sinclair |
Taille de l’image : | 4995 px × 3774 px |
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