There are three main types of herpes virus in horses: Equine herpesvirus 1 (EHV-1); which causes respiratory disease and also occasionally abortions and neurological disease. Equine herpesvirus 4 (EHV-4); causes respiratory disease (generally mild). Equine herpesvirus 3 (EHV-3); which is less commonly seen but may cause venereal disease in breeding mares and stallions.

Log in