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

The Equine Disease Communication Center (EDCC) reported June 13 that a horse from Island County, Washington, has tested positive for equine herpesvirus-1 (EHV-1).

The EDCC said the Washington State Department of Agriculture indicated the 18-year-old Quarter Horse gelding developed clinical signs—including a sore back, difficulty standing, and bladder atony (urine retention or dribbling)—on June 7. He tested positive for both EHV-1 wild-type and equine protozoal myeloencephalitis (or EPM) on June 11, the EDCC said. The horse had been vaccinated and is recovering.

The EDCC said the affected gelding’s home farm—along with 25 other horses residing there—have been quarantined

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