Equine herpesvirus is a major cause of respiratory and neurological disease in horses, with outbreaks causing welfare emergencies at equine facilities.
Horses with equine herpes myeloencephalopathy experience progressive loss of coordination and control of bodily functions that is distressing and functionally debilitating. Severely affected horses may be unable to stand and face difficult welfare decisions including euthanasia. The outbreak context means multiple horses at a facility may be affected simultaneously, creating strain on management and veterinary resources. Prevention through vaccination, hygiene, and movement controls is critical, as treatment options are limited.