Officials at the Oklahoma Department of Agriculture, Food and Forestry (ODAFF) have issued an update on the recent equine herpesvirus-1 (EHV-1) outbreak at Remington Park in Oklahoma County. As of today, all horses in the last remaining quarantined barn tested negative for EHV-1 using nasal swab and buffy coat.

Because Remington Park’s race meet has concluded, officials will now utilize empty barns to further separate and isolate trainers’ horses that have resided in the quarantine barn. The 13 exposed horses in the isolation barn continue under biosecurity measures and twice-daily temperature monitoring. ODAFF officials continue to monitor the situation on-site.

The first horse that tested positive, a 3-year-old Thoroughbred mare, was euthanized Nov. 12 due to the severity of her clinical signs of the neurologic form of EHV-1. At that time, 66 horses in her barn were placed under quarantine.

On Nov. 21, ODAFF confirmed two additional horses with positive EHV-1 tests: one in the index case’s barn and one in a second barn, where 100 horses were exposed and placed under quarantine