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Nature 423, 118-119 (8 May 2003) | doi:10.1038/423118a

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Crossing the species barrier

Richard E. Race1

BOOK REVIEWEDHow the Cows Turned Mad

by Maxime Schwartz


transl. Edward Schneider
University of California Press: 2003. 238 pp. $24.95, £17.95

Until 1996, the diseases of animals known as transmissible spongiform encephalopathies (TSEs), such as scrapie and bovine spongiform encephalopathy (BSE, or 'mad cow disease'), were regarded as agricultural problems with no known medical implications for humans. But then it became apparent that BSE had done what no other animal TSE had done before: transmit to humans.