ehm
In many horses, the only sign of EHV-1 infection is fever, which can go undetected. | Photo: Stephanie L. Church/The Horse

The North Dakota Department of Agriculture confirmed a case of equine herpesvirus myeloencephalopathy (EHM, the neurologic form of equine herpesvirus-1, EHV-1) in a Stutsman County horse on May 16, the Equine Disease Communication Center (EDCC) reported May 31.

“The horse began showing clinical signs on May 11 and was euthanized the next day due to poor prognosis,” the EDCC said. “Horses that were exposed within 72 hours prior to the onset of clinical illness are under quarantine.”

Herpesvirus is highly contagious among horses and can cause a variety of ailments in equids, including rhinopneumonitis (a respiratory disease usually found in young horses), abortion in broodmares, and EHM. In many horses, the only sign of EHV-1 infection is fever, which can go undetected

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