Equine Metritis Recurs In U.S.

Positive test found in horse as prompted Arizona to open an investigation.

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Following a positive test of a Maricopa County horse for Taylorella equigenitalis, a comprehensive epidemiological investigation has been initiated by the Arizona Department of Agriculture and United States Department of Agriculture (USDA) officials.

Laboratory tests showed the Arizona horse has a subclinical infection of Taylorella equigenitalis, a Gram-negative bacterium of the genus Taylorella, and the causative agent of Contagious Equine Metritis (CEM) in horses.

There currently is no known relationship between the positive stallion and any horses associated with the previous U.S. cases of CEM.

The horse is being quarantine although vaccination in prohibited during an active infection. Treatment of the infected animal will follow protocols in accordance with Federal, International and expert guidance and requirements.

Weekly follow-up reports will be issued by Dr. John Clifford, deputy administrator, Animal and Plant Health Inspection Service, USDA.


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