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ARS Home Office of Communications Images Photos May09





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Image Number D1441-1 A cow naturally infected with *M. avium*subspecies *paratuberculosis* that is in the late stages of disease and has typical clinical signs such as weight loss, watery diarrhea, and general poor health.  This cow is part of a study herd used in research on Johne’s disease at the National Animal Disease Center, Ames, Iowa.  Photo by Peggy Greb.  640 pixels wide: (d1441-1.jpg)   Please visit our Image Gallery


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