Horse owner checking thermometer
Photo: Stephanie L. Church/The Horse

Veterinarians diagnosed a cutting horse in Arizona with equine herpesvirus myeloencephalopathy (EHM) on March 2, 2018, according to the Equine Disease Communication Center.

The 9-year-old Quarter Horse gelding attended a cutting horse event at South Point Arena in Las Vegas in early February and an Arizona Cutting Horse Association (ACHA) show in Queen Creek the weekend prior to developing neurologic signs of disease.

Equine herpesvirus myeloencephalopathy is the neurologic form of equine herpesvirus (EHV), a highly contagious disease spread by respiratory secretions and horse-to-horse contact. Horses are more susceptible to infection when under stress, including transportation and competition.

The Associated Press is reporting that the Nevada state veterinarian’s office has contacted animal health officials in 18 states with residents who participated in the Las Vegas event, not including Arizona and Nevada

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