Mad Cow Future: Tests explore next generation of defenses | Science News

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Mad Cow Future: Tests explore next generation of defenses

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11:41am, May 28, 2003

As Canadian health officials press on in their investigation of mad cow disease within their borders and other countries bar Canadian beef, scientists are taking disparate approaches to developing defenses against such brain diseases.

Researchers in the United Kingdom studying livestock that resist so-called transmissible spongiform encephalopathies report mixed results. Although earlier tests had found some sheep resistant to infection by natural routes, extreme challenges–injections of diseased material directly into the brain–brought on the disease in 3 out of 19 animals, says Fiona Houston of the Institute for Animal Health in N

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