The DeKalb County Health Department says more mosquitoes in the county have tested positive for West Nile virus.

A batch of mosquitoes in Genoa have tested positive for the virus. The health department also says that mosquitoes trapped in DeKalb and Sycamore continue to test positive. The virus is spread to humans by infected mosquitoes.

There have been eight human cases of the virus in Illinois this year. None have been in DeKalb County. People are encouraged to cover up when outdoors, especially in the evening when mosquitoes are most active, and wear insect repellent. People can also help keep the mosquito population down by dumping standing water where mosquitoes lay their eggs.