Health officials on Friday confirmed the first human case of West Nile Virus this summer in Oklahoma County.“Residents should be vigilant by getting rid of any sources of stagnant water and always wear repellent containing DEET,” Public Health Protection Director Phil Maytubby said.Residents are urged to check their property carefully. Empty buckets, flower pots, old tires holding water. Empty and refill birdbaths along with your pet’s outdoor water bowl daily. For standing water that cannot be drained, officials said to use microbial larvicides commonly called “dunks” that kill mosquito larvae before they emerge as adults. They are available at hardware or home improvement stores.Maytubby notes that West Nile Virus can be debilitating and deadly.Use 3-D’s and a “P” of mosquito safety:1. DRAIN standing water on your property so mosquitoes won't breed2. Use DEET repellent on your clothes3. DRESS in long sleeves and pants 4. PROTECT – limit outside exposure and check window screensWest Nile symptoms include fever, headache, body ache, and sometimes a rash. The most susceptible are infants, the elderly and those with weakened immune systems. If symptoms are severe, contact your doctor immediately.