Equine Herpesvirus 1 (EHV-1)
Equine herpesvirus type 1 (EHV-1) is a viral infection of horses that causes equine rhinopneumonitis. EHV is spread through direct contact with an infected horse, contaminated equipment or handlers, and airborne secretions from a coughing horse.
Horses infected with EHV-1 can develop respiratory symptoms, fever, neurological signs and pregnant mares may abort their fetus. Like other herpesvirus agents, EHV may reside in an infected horse permanently and symptoms can develop again later. There are vaccines available for EHV-1, but they do not protect against the neurological form of this disease.
EHV-1 has a presence worldwide and is found throughout the United States. Horses that have been exposed should be isolated for at least 21 days.
Any case of EHV-1 in horses must be reported to the Board by calling 651-201-6804.