A Walla Walla County resident may have West Nile virus.
The county health department has been notified of a probable case. No details about the patient -- including his or her age, gender or where in the county he or she lives -- are being released.
West Nile virus is transmitted by mosquitoes. Most people who contract it don't have symptoms, although about 20 percent develop West Nile Fever, which can involve fever, rash, headache, joint paint and similar issues, the health district said in a news release.
A small number of people become seriously ill.
The health district is urging people to protect themselves against mosquito bites by using repellent, wearing long sleeves and pants outdoors when possible, especially at dusk and dawn, securing doors and windows in the home and getting rid of any standing water.
The Benton-Franklin Health District hasn't reported any local cases of West Nile infection in people this season, but mosquitoes carrying the virus have been found in both those counties. Infected mosquitoes also have been found in Grant County.