Officials at the New York Racing Association (NYRA) and the New York State Gaming Commission have placed Barn 10 at Belmont Park, in Elmont, New York, under quarantine after a suspected case of equine herpes myeloencephalopathy (EHM) developed in that barn. The quarantine is effective immediately.

The affected horse, a 4-year-old filly trained by Tom Albertrani, developed a fever on Feb. 12 and started treatment under the care of a private veterinarian. On Thursday evening, the filly began exhibiting clear neurologic symptoms.

At 7 p.m. on Thursday, and in consultation with the New York State Gaming Commission, Anthony Verderosa, DVM, director of NYRA’s Veterinary Department, placed Barn 10 at Belmont Park under a 21-day quarantine.

By Friday, the filly’s health had continued to worsen, and the decision was made to euthanize her. The horse will be taken to Cornell University College of Veterinary Medicine in Ithaca, New York, for a full necropsy