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Pennsylvania Horse Tests Positive for EHM

November 5, 2019
Posted by Edited Press Release

Thirty-three additional horses were exposed to equine herpesvirus myeloencephalopathy.

Topics: Diseases and Conditions, Equine Herpesvirus (EHV), Horse Care, Horse Industry News, Infectious Diseases, Welfare and Industry

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Pennsylvania Horses Tests Positive for EHM

In many horses, the first or only sign of EHV-1 infection is fever, which can go undetected. | Photo: Stephanie L. Church/The Horse

Pennsylvania Department of Agriculture officials confirmed on Oct. 28 that one horse tested positive for the neurologic form of equine herpesvirus-1 (EHV-1) and 33 horses were exposed in Chester County.

The positive horse, a 14-year-old Quarter Horse mare, began showing clinical signs of limb edema (fluid swelling), recumbency (down and unable to get up), urine dribbling, and poor tail tone on Oct. 27. She was subsequently euthanized.

Only the affected premises has been quarantined; statewide restrictions have not been enacted.

EHV 101

Herpesvirus is highly contagious among horses and can cause a variety of ailments in equids, including rhinopneumonitis (a respiratory disease usually found in young horses), abortion in broodmares, and equine herpesvirus myeloencephalopathy (EHM, the neurologic form)

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