Johne's disease is a chronic infection with Mycobacterium avium susp. paratuberculosis (MAP), which causes huge economic losses to cattle industry. The seroprevalence of MAP in cattle of Mongolian was estimated by an ELISA assay using 356 serum samples which were collected from eleven provinces and Ulaanbaatar city. Out of these samples, 3 (0.84%) were found to be seropositive for MAP, originating from Tsenkher sum of Arkhangai province, Murun sum of Khuvsgul province, and Bornuur sum of Tuv province in Mongolia. This study represents first conformation of Johne's disease in Mongolian cattle. These findings provide vital information that can be used for the planning and execution of control measures for Johne's disease in the Mongolian cattle industry.
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