On Jan. 28, Oklahoma Department of Agriculture, Food and Forestry (ODAFF) officials released Remington Park, in Oklahoma County, from quarantine for equine herpesvirus-1 (EHV-1). The final three horses under quarantine at the racetrack completed two negative tests seven days apart and 14 days with no fevers, no clinical signs of EHV-1, and no exposure to EHV-1-positive horses. Two additional horses remain under quarantine at their owner’s premises, where they will complete the quarantine protocol.

Outbreak Recap

The outbreak began Nov. 12, 2019, when a 3-year-old Thoroughbred mare at the track presented with clinical signs of the neurologic form of EHV-1 that resulted in her euthanasia Nov. 14. 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.

Following the quarantines, New Mexico and Kentucky state officials restricted admission to racetracks in their states of horses from Remington Park