West Nile Virus season begins in May and the Evanston Health Department is asking residents to inspect their yards and homes for any containers holding water for more than three days.

These containers include watering cans, pet dishes, Frisbees and plastic cups among others. West Nile Virus mosquitoes are not associated with floods but rather heat and drought.

West Nile virus is transmitted through the bite of a mosquito that has picked up the virus by feeding on an infected bird.

Most people with the virus have no clinical symptoms of illness, but some may become ill three to 15 days after the bite of an infected mosquito. The first human case in Illinois is not usually reported until July or later.

Only about two people in ten who are bitten by an infected mosquito will experience any illness. Illness from West Nile is usually mild and includes fever, headache and body aches, but serious illness, such as encephalitis and meningitis, and death are possible. Persons older than 50 years of age have the highest risk of severe disease.

The best way to prevent West Nile disease 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 includes 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 that can support mosquito breeding, including water in bird baths, ponds, flowerpots, wading pools, old tires and any other receptacles.

Call 3-1-1 or email health@cityofevanston.org for more information.
Additional online resources include:

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1 Comment

  1. West Nile Virus

    Another way people can help stop West Nile is to eliminate the "opt out" of mosquito spraying–if people are allergic, they can close windows or leave for an evening. Otherwise the mosquitoes in the "opt out" area spread once the spray has dissipated and the spraying has only postponed the problem and cost money besides.

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