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Test EVERY Cow in the Food Chain

Test EVERY Cow in the Food Chain
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Thursday, May 28, 2009

Scientists find prions in soil

Old but IMPORTANT News: In case you missed it the first time

April 14, 2006

Scientists at the University of Wisconsin have discovered that prions, which cause chronic wasting disease in deer, can live in the soil.

CWD is one of a family of neurological disorders known as transmissible spongiform encephalopathies that also include "mad cow" disease, sheep scrapie and Creutzfeldt-Jacob disease in humans. The diseases are incurable.

The researchers found that certain types of soil serve as prion repositories, and the prions found there can remain dangerous. Because animals sometimes consume soil to meet their mineral needs, they could become infected.

"Prions most likely enter soil via excretion or from the carcasses of infected animals," said lead author Christopher Johnson, a doctoral student in the department of animal health and biomedical sciences. "Our results suggest that reducing the number of infected animals -- as has been done in the recent outbreak of CWD in Wisconsin -- could limit the potential for further spread."

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