A Fresh Look at BSE

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Science  24 Sep 2004:
Vol. 305, Issue 5692, pp. 1918-1921
DOI: 10.1126/science.1103581

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The discovery of two cows with bovine spongiform encephalopathy (BSE) in North America in the past year has dramatically increased concern about the threat posed by BSE to human health and domestic livestock in the United States and Canada. In his Perspective, Chesebro discusses the possible etiology of BSE in the two infected animals and suggests possible ways to prevent the spread of BSE.