Two Lipizzaner stallions in Dane County, Wisc., are enjoying the dubious honor of being the country's first cases of contagious equine metritis (CEM) since 1998.

The Office International des Epizooties (OIE, or World Organization for Animal Health) reported the positive tests via a ProMED-mail post Oct. 16.

CEM is an acute, highly contagious bacterial infection that often causes no

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