The Oklahoma Department of Agriculture confirmed a case of neurologic equine herpesvirus at Remington Park Racetrack in Oklahoma. A total of 66 horses in one barn have been exposed and have been placed under quarantine.

The 3-year-old Thoroughbred mare had onset of clinical signs for neurologic herpesvirus (also known as equine herpesvirus myeloencephalopathy or EHM) on November 12 that included ataxia, fever and becoming unable to rise. The mare was euthanized. Her vaccination status was unknown.

Information for this report was provided by the Equine Disease Communication Center.