Hunt for Mad Cow in Sheep Reassuring

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Science  11 Aug 2000:
Vol. 289, Issue 5481, pp. 849
DOI: 10.1126/science.289.5481.849

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Experts on brain-riddling spongiform diseases have grown steadily more uneasy over signs that so-called mad cow disease or bovine spongiform encephalopathy (BSE), which is linked to a lethal human illness, may be lurking in sheep. A study in the 10 August issue of Nature now offers evidence that BSE is not rampant in sheep after all, although scientists are far from ready to let their guard down.