Thoroughbred EHV-1 Kentucky and Illinois

UPDATE: EHV-1 Cases Identified at Turfway Park, Keeneland

Kentucky, Louisiana EHV-1

Kentucky investigators identified two additional horses positive for the equine herpes virus at Turfway Park in Florence.

Nasal swabs detected the “wild strain” of the virus in two Thoroughbreds. The 4-year-old gelding and 9-year-old mare have the same trainer.

Officials say there have been no other clinical developments in the other horses stabled in Barn 27. They are considering options for removing the two horses while the others are managed.

Whole blood samples were submitted from two quarantined barns at Keeneland. Tests identified one EHV-1 positive horse. The 3-year-old Thoroughbred colt is in isolation.

Veterinarians collected nasal swab tests from the remaining horses currently confined.

Louisiana officials retested all horses isolated at the Fair Grounds racetrack in New Orleans with blood and nasal swabs for EHV-1. Out of 37 horses, five horses continue to test positive for the non-neuropathogenic type of EHV. The results are based on the nasal swab test results.

Five horses completed quarantine and have been released.

Scheduled retesting continues on isolated horses until the release requirements are fulfilled. No new symptomatic horses have been reported, but Louisiana authorities say biosecurity remains in force.


EHV-1 Leads to Quarantine at Turfway Park

January 23, 2017

Kentucky’s state veterinarian quarantined a barn on the backside of Turfway Park Saturday after a horse that left the property tested positive for the equine herpes virus (EHV-1).

A 3-year-old Thoroughbred filly was stabled at the Turfway barn from late October until January 19. A nasal swab was collected when the filly was moved to a private facility for breeding on Thursday. The test confirmed the horse is positive for the wild strain. The facility has isolated the filly.

Officials identified horses in two Keeneland barns that may have also been exposed due to horse movement from Turfway. Both barns are quarantined and veterinarians have pulled additional samples.

We will bring you the latest from Kentucky as more information becomes available.


Two Private Kentucky Facilities Quarantined

January 14, 2017

Kentucky officials quarantine a second Oldham County stable due to the equine herpes virus (EHV-1).

Veterinarians tested a horse for the virus after it developed a fever without neurologic signs on January 9. Tests confirm the horse is positive for the wild strain. Officials isolated the horse.

They collected samples from the horses residing in the same barn with the index horse at the private stable. Tests confirmed five additional horses have EHV-1.

Horses are exposed to the EHV-1 virus at a young age. Once exposed, equine herpes has the ability to lay dormant as a latent infection. The virus resides within the horse and can become an active viral infection anytime, especially if the horse is stressed.

The incubation period for EHV-1 may be as short as a day up to 10 days. A horse can shed the virus for seven to 10 days. Shedding has been documented for up to 28 days after clinical signs have been recognized, according to experts.

The state veterinarian’s office states four horses have tested positive at the original Oldham County premises. Those horses are suffering from the mutated strain of EHV-1, which causes neurologic symptoms.

An outbreak of EHV-1 continues at the Fair Grounds Race Course in New Orleans, LA. The count stands at 39 confirmed cases. Testing of pony horses begins Monday.