Laboratory tests completed at the New York State Veterinary Diagnostic Laboratory revealed that at least four horses stabled at Vernon Downs Raceway have been infected with a strain of the equine herpesvirus-1 (EHV-1), according to a joint statement from New York State Department of Agriculture and Markets Commissioner Darrel J. Aubertine and State Gaming Commission Acting Executive Director Robert Williams. The statement indicated the affected horses were stalled in two barns at the track; both barns have since been quarantined.

Because of its condition and prognosis due to the infection, one Standardbred horse was humanely euthanized, the statement noted, while the other three remain under quarantine in two barns at the racetrack.

"As of May 6, no other horses at New York racetracks have been reported to have EHV-1," the statement read