MEMPHIS, Tenn. (AP) -- Shelby County health officials say they have confirmed three cases of West Nile disease so far this year. There have been five confirmed statewide.
The cases in Shelby County are those of a 48-year-old man, a 63-year-old woman and a 25-year-old man.
Dr. Dan Sprenger of the county health department said the virus that causes the disease has been found in mosquitoes trapped in all zip codes within Shelby County.
There is no vaccine to ward off the disease, so being vigilant about using insect repellant containing DEET is the best defense.
About 20 percent of the people who become infected have symptoms such as fever, headache and body aches, nausea, vomiting and sometimes swollen lymph glands or a skin rash.
People over the age of 50 are more likely to develop serious symptoms