Study: Disease risk posed by roaming bison is low

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BILLINGS, Mont. (AP) — A new study says more bison could be allowed to migrate outside Yellowstone National Park without significantly increasing the risk of spreading a disease carried by the animals to livestock.

Yellowstone’s estimated 3,000 bison are periodically culled during their winter migration to prevent the spread of the disease brucellosis to cattle.

But in a study scheduled to appear in the February issue of the Journal of Applied Ecology, researchers argue much of that culling is unnecessary because there are few cattle in areas next to the park.


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