Equine Herpesvirus 1: Pathophysiology and Commonly Asked Questions

The following information was posted on The Ohio State University Veterinary Teaching Hospital’s web site Feb. 26. The author, Catherine W. Kohn, VMD, Dipl. ACVIM, is professor of equine medicine and surgery at OSU.

Typical Clinical Signs of EHV-1 Infection
 
Upper respiratory infection is the most common manifestation of EHV-1 infection. Commonly

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The following information was posted on The Ohio State University Veterinary Teaching Hospital’s web site Feb. 26. The author, Catherine W. Kohn, VMD, Dipl. ACVIM, is professor of equine medicine and surgery at OSU.

Typical Clinical Signs of EHV-1 Infection
 
Upper respiratory infection is the most common manifestation of EHV-1 infection. Commonly, young horses (weanlings, yearlings, and 2 year olds) have depression, poor appetite, nasal discharge and cough. If young horses are housed or pastured together, many horses in the herd may experience disease from which they recover uneventfully. Disease may be mild or unapparent in older horses.
 
EHV-1 infection in pregnant mares may result in abortion. Appropriate vaccination has greatly reduced the incidence of outbreaks of virus abortion on breeding farms

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Catherine Kohn, VMD, currently at The Ohio State University College of Veterinary Medicine, serves as United States Equestrian Team veterinarian and was the FEI veterinary delegate at the U.S. Olympics in 1996 and at Rolex Kentucky in 1998.

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