The Washington State Department of Agriculture (WSDA) is reporting that an unvaccinated horse in Omak is the second case of equine West Nile virus confirmed in the state this summer. The 17-year-old palomino gelding was not vaccinated for the virus and has not traveled out of state. The horse is responding to treatment at this time.

The Washington Animal Disease Diagnostic Laboratory in Pullman reported the positive test results to the State Veterinarian’s Office on Friday. The state’s first case of equine West Nile virus this year was reported Aug. 19, involving a Franklin County horse that was not vaccinated. That horse was euthanized

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