A Standardbred horse at The Meadows Racetrack, in Washington, Pennsylvania, that began showing clinical signs consisted with equine herpes myeloencephalopathy has tested positive for equine herpesvirus-1 (EHV-1), the Equine Disease Communication Center (EDCC) reported Jan. 24. The horse is being treated by a veterinarian.

“Two barns at The Meadows are currently under quarantine due to a horse that moved earlier from the original exposed barn,” the EDCC said. “This horse causing the second barn’s movement restriction is not showing clinical signs. A daily monitoring period for clinical signs in the remaining exposed, asymptomatic horses is ongoing.”

TheHorse.com will provide additional information as it becomes available.

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 myeloencephalopathy (the neurologic form). In many horses, fever is the only sign of EHV-1 infection, which can go undetected