Kentucky EHV-1 Update March 15, 2021

Testing continues to take place to identify any additional horses that test positive for equine herpesvirus at facilities in Kentucky.
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Two horses from Barn B of the index premises had trace amounts of EHV-1 DNA detected in nasal swap testing.

The additional 24 horses in Barn B of the index EHV-1 affected premises were sampled on Friday due to potential exposure of indirect transmission (riders) having occurred prior to confirmation of the index case. Two horses from this group had a trace amount of EHV-1 DNA detected in the nasal swab and were removed from the barn and segregated on Saturday.

Read this previous article about the Kentucky neurologic equine herpesvirus event: "Additional Kentucky Horses Test Positive for EHV-1 (Neuropathogenic Strain)"—Additional Kentucky horses test positive for the neuropathogenic strain of equine herpesvirus; index case from Woodford County was euthanized.

To date, 18 horses in index Barn A and 22 horses in Barn B have had one set of negative test (nasal swab and/or blood). The last febrile horse was removed from Barn A and placed in isolation on March 10, 2021. There have been no clinical horses in Barn B since the start of the outbreak.

Five of the nine horses in the isolation barn have tested positive with the last fever reported on Friday, March 12, 2021. All horses in isolation are being monitored by the attending veterinarian.

A second round of testing is being planned for the horses in barns A, B and Isolation.

The management and staff of the premises continue to implement enhanced biosecurity and health monitoring protocols, including multiple daily temperature recordings. Additionally, these enhanced measures have been implemented at other sanctioned training facilities in Kentucky.

Staff from the Office of the State Veterinarian continue to closely monitor the situation.

Appropriate biosecurity and other safeguards are fully implemented at Turfway Park.

Updates will continue to be provided as information is learned.

Information for this report was provided by E.S. "Rusty" Ford, Equine Operations Consultant, Office of the Kentucky State Veterinarian.

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