A horse in the Queen Creek area has tested positive for West Nile virus. This is the first horse-related case of the disease in Pinal County this year.

County health officials are recommending residents have their horses vaccinated for West Nile virus and Western Equine Encephalitis. Both are transmitted by mosquitoes that feed on infected birds. Symptoms of both can include depression, lack of appetite, coordination problems, circling, head pressing and muscle tremors. Affected horses may go down and not be able to get back up. If a horse displays these symptoms, contact a veterinarian immediately