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2006

Iowa State University

Agricultural Science

Series

Iowa State Research Farm Progress Reports

Veterinary Diagnostic and Production Animal Medicine

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Johne’S Disease Status Of The Mcnay Sheep Flock, Suelee Robbe-Austerman, Daniel G. Morrical Jan 2006

Johne’S Disease Status Of The Mcnay Sheep Flock, Suelee Robbe-Austerman, Daniel G. Morrical

Iowa State Research Farm Progress Reports

Johne’s disease caused by Mycobacterium avium subsp. paratuberculosis (MAP) results in chronic weight loss and eventual death in sheep as well as in other ruminants. The disease has spread throughout the U.S.sheep flock, and it is estimated that 10% or possibly more of the flocks in the U.S. are infected. Sheep can be infected and spread the organism for years before succumbing to the disease. Current diagnostic tests are unable to detect animals in the early stages of infection, and because there is a lack of “known negative” sheep in production settings, the development and subsequent ...