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First Human Case of West Nile Virus In Illinois for 2019

Post Date:08/14/2019 10:13 AM

mosquitoThe City of Evanston's Health and Human Services Department has received a report of the first human case of West Nile virus in Illinois for 2019. A Chicago resident in his 70s became ill in late July.

Last year, 74 counties in Illinois reported a West Nile virus positive mosquito batch, bird and/or human case.  For the 2018 season, IDPH reported 176 human cases (although human cases are underreported), including 17 deaths. 

West Nile virus is transmitted through the bite of a Culex pipiens mosquito, commonly called a house mosquito, which has picked up the virus by feeding on an infected bird. Common symptoms include fever, nausea, headache and muscle aches. Symptoms may last from a few days to a few weeks. However, four out of five people infected with West Nile virus will not show any symptoms. In rare cases, severe illness including meningitis or encephalitis, or even death, can occur. People 60 years or older and individuals with weakened immune systems are at higher risk for severe illness from West Nile virus.

The best way to prevent West Nile virus or any other mosquito-borne illness is to reduce the number of mosquitoes around your home and to take personal precautions to avoid mosquito bites. Precautions include:

  • Avoid being outdoors when mosquitoes are most active, especially between dusk and dawn
  • When outdoors, wear shoes and socks, long pants and a long-sleeved shirt and apply insect repellent that contains DEET, picaridin, oil of lemon eucalyptus or IR 3535, according to label instructions. Consult a physician before using repellents on infants.
  • Make sure doors and windows have tight-fitting screens. Repair or replace screens that have tears or other openings. Try to keep doors and windows shut, especially at night.
  • Eliminate all sources of standing water where mosquitoes can breed, including water in bird baths, ponds, flowerpots, wading pools, old tires, and any other containers.

Contact the North Shore Mosquito Abatement District (NSMAD) via email at or call 847-446-9434 to report areas of stagnant water in roadside ditches, flooded yards and similar locations that may produce mosquitoes. Community members can also report stagnant water to Evanston's Health and Human Services Department by calling/texting 847-448-4311.

If you observe a sick or dying crow, blue jay, robin or other perching bird, please report it by calling/texting 847-448-4311. The Evanston Health and Human Services will then determine if the bird will be picked up for testing.

Additional information about West Nile virus can be found on the IDPH website.

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