On April 14, the Texas Animal Health Commission confirmed a positive case of equine herpesvirus myeloencephalopathy (EHM) in Glasscock County. The 16-year-old Quarter Horse mare had onset of clinical signs on April 14 that included noticeable neurologic signs. The mare has been quarantined.
The mare had attended a seven-day event at the Brazos County Expo center in Bryan, Texas, starting on April 1. The mare then attended a three-day barrel racing event at the Taylor County Expo Center in Abilene, Texas, starting on April 12. At that time, the Taylor County Expo Center was also hosting a Region II High School Rodeo.
The premises where the mare originates is under quarantine and the positive horse is under the care of a Brazos County veterinary hospital. The mare was quarantined after showing signs of ataxia and other neurologic signs consistent with EHM.