Michelle Manchir/TribLocal reporter

Mosquitoes in the Bolingbrook area have tested positive for the West Nile Virus, but no human cases have been reported yet this year in Illinois, the county health department said.

The Health Department on Tuesday found positive mosquitoes in samples of the insect taken from a Bolingbrook site near the park district main office, 201 Recreation Drive.

That does not mean all mosquitoes in the area carry the virus, said Vic Reato, spokesman for the Will County Health Department.

Reato said elderly people and those with compromised immune systems due to illness or age are most at risk for showing symptoms of the virus, which generally occur three or more days after an infected mosquito bites.

More severe infections are marked by a high fever with head and body aches, disorientation, tremors, and convulsions.

“For most people the risk is not high,” Reato said.

Still, the health department urges people to wear bug repellent while outdoors that contains DEET and to rid their yards of pools of standing water or high grass, where mosquitoes tend to breed.

Anyone with symptoms for more than 24 hours should contact a physician.

Bolingbrook regularly treats ponds, storm sewers and wetland areas during summer for mosquito larvae to prevent it from hatching, according to the Public Works Department.

Will County is one of 15 Illinois communities to report West Nile Virus activity. Cook, DuPage and Kane Counties have also had reports this year, according to the health department.

For information on the virus, visit the state health department Web site, www.idph.state.il.us or call the Will County Health Department at (815) 727-8480.