CEM Investigation: 23 Positive Stallions

A stallion in Wisconsin has become positive stallion No. 23 in an ongoing investigation into contagious equine metritis (CEM).

Wisconsin State Veterinarian Robert Ehlenfeldt, DVM, said this horse is considered part of the outbreak that was first discovered in 2008 because he has the same strain of causative bacterium Taylorella equigenitalis as the other horses associated w

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