Herpesvirus 4, Equid

**Definition:** A species of VARICELLOVIRUS and the chief cause of rhinopneumonitis in horses.

**Tree numbers:** - B04.280.382.100.900.440

**Synonyms:** - Equid Herpesvirus 4 - Equine Rhinopneumonitis Virus - Equine Herpesvirus 4 - EHV-4