Contagious equine metritis is a bacterial venereal disease transmitted primarily through breeding and has been detected sporadically in the United States, most recently in 2024. The USDA details the spread of the disease here, from pony stallions on a Florida facility to horses of other breeds around the country.
Fifty two cases, including 18 domestic ponies, 18 riding horses of various breeds and 16 draft horses were confirmed Taylorella equigenitalis-positive and connected to a single farm in Orange County, Florida. The epidemiological investigation into this outbreak is ongoing.
Source: Paulick Report, March 12, 2025. Link.
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