Four horses on New York farm test positive for EHV-1; one horse had recently competed at large show facility

Veterinary officials urge owners who may have been at the same show to follow monitoring protocols to detect signs of illness in their horses

Four horses at a stable in Brewster, New York, have the neurologic form of equine herpes virus, type-1, including one horse who had recently competed at a large show facility, according to the Equine Disease Communication Center (EDCC).

EHV-1 most often causes mild-to-moderate respiratory illness (rhinopneumonitis), but the infection occasionally leads to the life-threatening neurologic disease equine herpesvirus myeloencephalopathy (EHM). The mechanisms through which EHV-1 produces neurologic disease are not yet understood.

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