Health officials in DeKalb County detected the first mosquitoes with West Nile Virus this summer.
Municipalities say they monitor catch basins that help eliminate mosquitoes, but recent heavy rains may have flushed out mosquito larvae.
Several other counties in the state already reported cases of West Nile Virus in mosquitoes this year. But there has yet to be a human case so far.
The mosquitoes get the virus from feeding on dead birds. The Health Department is collecting dead birds to be sent to the state lab for testing.
Illness from West Nile is usually mild. It includes fever, headache and body aches. But death can occur.
Last year, there were four deaths in Illinois associated with West Nile. In 2002, Illinois had 67 deaths from the virus.
