West Nile virus

A dead bird found in Winnebago County has tested positive for West Nile Virus, which is much earlier than last year when the first positive bird in the county was found on September 2, according to a news release from the Winnebago County Health Department.

Warmer temperatures can increase the rate of Culex mosquito production, flight activity and virus replication, which results in an increased number of WNV infected mosquitos.

James Gathany / CDC

Two elderly women in northern Illinois have died after contracting West Nile virus.

The Kane County Health Department has confirmed the first human case of West Nile virus in the county this year.

U.S. Geological Survey

West Nile virus continues to be a threat in northern Illinois.

The temperature may be cooling off, but you'll still want to keep an eye on those mosquitoes. Winnebago County officials confirmed this week that a bird tested positive for West Nile virus. It's the 13th year in a row the virus has been confirmed in the county. The infected bird was found much later than last year.

Map: Bird Cases Of West Nile Virus

The Boone County Department of Public Health today confirmed that a Belvidere man is the first human case of West Nile Virus (WNV) in the county in 2014.

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