New Cases of Equine Herpesvirus Type 1 Reported in Washington State

Checking horse for EHV-1.
Checking horse for EHV-1.

Newsdate: Wed, December 27, 2017, 8:00 am

The Washington State Department of Agriculture has reported a new case of equine herpesvirus type 1 (EHV-1) in a 13-year-old Halflinger gelding at a facility in King County, Washington.

A sick horse

A sick horse

Sixteen horses are confirmed positive for the EHV-1 neurotropic strain of EHV-1 and seven horses have been euthanized due to equine herpesvirus myeloencepalopathy.

Officials report that 37 of 60 horses have now been tested, with 16 horses confirmed positive for the EHV-1 neurotropic strain. Seven horses have been euthanized due to equine herpesvirus myeloencepalopathy (EHM).

Clinical signs of the EHM horses included 102-105 degree fevers, hind limb ataxia, no tail tone and dribbling urine. Treatment of horses includes supportive care and anti-viral therapy. The attending veterinarian is making morning and evening rounds at the barn and evaluating fevers and clinical signs.

The horse facility is still under quarantine and strict equine biosecurity in place. At this time no other horse facilities are reporting new cases in the state of Washington.

Pennsylvania EHV-1 Quarantine Released

On Tuesday December 26, 2017, the quarantine put in place in Butler County, Pennsylvania, which arose from an initial EHV-1 quarantine on November 15, 2017, has been revoked by the Pennsylvania Department of Agriculture.

This was the index premises, a small dressage barn. One other closely related private barn was also under quarantine, but that quarantine was released on December 6, 2017. No additional cases beyond the index case, which has recovered, were identified during this quarantine.

The Equine Disease Communication Center (EDCC) works to protect horses and the horse industry from the threat of infectious diseases in North America. The communication system is designed to seek and report real time information about disease outbreaks similar to how the Centers for Disease Control and Prevention (CDC) alerts the human population about diseases in people.

About the Author

Flossie Sellers

As an animal lover since childhood, Flossie was delighted when Mark, the CEO and developer of EquiMed asked her to join his team of contributors.

She enrolled in My Horse University at Michigan State and completed a number of courses in everything related to horse health, nutrition, diseases and conditions, medications, hoof and dental care, barn safety, and first aid.

Staying  up-to-date on the latest developments in horse care and equine health is now a habit, and she enjoys sharing a wealth of information with horse owners everywhere..