The Texas Animal Health Commission (TAHC) is investigating two confirmed cases of neurologic equine herpesvirus-1 (EHV-1) in horses at two different stables in northwestern Galveston County.

The TAHC said laboratory tests conducted on nasal swabs were positive for the neuropathogenic strain of the virus. There is no indication of involvement of horses outside of those stabled at the two facilities, the commission said.

A statement on the TAHC website indicates that the first confirmed horse showed signs of respiratory illness on Jan. 24, and the owner ought veterinary care. Prior to death, that horse showed some changes in behavior, but did not exhibit the usual neurologic signs associated with EHV-1.

The second horse that tested positive for EHV-1 exhibited a fever and respiratory signs, and remains under close veterinary care