Outbreaks | Equine Disease Communication Center

Updates on current disease outbreaks are listed here as they occur and will include the date listed, disease name, location and current status. Specific premises will not be named but the general location by town, county and state will be listed. When locations, events or horses are at risk they will be listed. Updates will be posted as they are received.

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West Nile Virus

KEnnewick, Yakima, Benton, Franklin and Adams counties, WA

Alert ID: 77

August 04, 2015

The Washington State Department of Agriculture (WSDA) has confirmed five new cases of West Nile virus in horses, bringing to six the number of cases so far this year and now surpassing the total number in the state for all of 2014. The first case of West Nile virus in a horse this year was reported July 21 and involved an unvaccinated Quarter horse gelding in Kennewick. The horse’s condition continues to improve. Veterinarians reported four new cases since then, all confirmed as positive for West Nile virus by the Washington State University’s Animal Disease Diagnostic Laboratory in Pullman. They include: -A two-year-old unvaccinated Andalusian stud colt from Harrah, Yakima County. The horse’s condition is improving. -A four-year-old unvaccinated Andalusian stud in Kennewick, Benton County. It has been euthanized. -A three-year-old unvaccinated Quarter horse gelding in Mesa, Franklin County. The horse died. -A nine-year-old Appaloosa mare in Othello, Adams County. It is unclear if it was vaccinated, but appears to be recovering. -A three-year old Azteca male in Mabton, Yakima county. The horse was not vaccinated and appears to be recovering.

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