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Welcome to the Equestrian Outreach Equine Viral Arteritis Page

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Equine Viral Arteritis (EVA) Overview

Diagnosing horse ailments requires a vet. (Click here for a list of Florida veterinarians by county)

Equine viral arteritis (EVA) is a disease of horses caused by an RNA virus of the genus Arterivirus. The virus which causes EVA was first isolated from horses in Ohio in 1953 but the disease has afflicted equine animals worldwide for centuries. It has been more common in some breeds of horses in the United States, but there is no breed “immunity.” There is no known human hazard.

Arteriviruses are small, enveloped, animal viruses with an icosahedral core containing a positive-sense RNA genome. The family includes Equine arteritis virus (EAV), porcine reproductive and respiratory syndrome virus (PRRSV), lactate dehydrogenase elevating virus (LDV) of mice and simian haemorrhagic fever virus (SHFV).