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West Nile active in Illinois     Send a link to a friend

[JUNE 22, 2004]  SPRINGFIELD -- The Illinois Department of Public Health reported Friday that a dead crow found June 16 in Sterling in Whiteside County has tested positive for West Nile virus by the Illinois Department of Agriculture Laboratory in Galesburg.

A total of 32 birds in 18 counties have now tested positive for West Nile virus since state and local health departments began surveillance for the mosquito-borne disease on May 1. No human cases of West Nile disease have been reported.

Other positive birds have been reported in the following counties: Adams; Boone; Champaign, 2; Cook, 3; DuPage, 2; Kane, 4; Kankakee, 3; Lake; Macon, 2; Madison, 2; McHenry, 2; McLean, 2; Ogle; Rock Island; Stephenson, 2; Vermilion; and Winnebago. In addition, mosquito pools in Cook and DuPage counties have tested positive for West Nile.

In 2003, 75 of the state's 102 counties had a West Nile-positive bird, mosquito, horse or human. A total of 54 human cases of West Nile disease, including one fatality, were reported last year in Illinois. In 2002, the state led the nation with 884 human cases and 66 deaths, and West Nile activity was reported in 100 of 102 counties.

Surveillance for West Nile virus includes collecting dead crows and blue jays. Citizens who observe a sick or dying crow or blue jay should contact their local health department, which will determine if the bird is to be picked up for testing.

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 14 days after the bite of an infected mosquito.


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West Nile infections can be mild and include fever, headache and body aches, or can be severe and marked by headache, high fever, neck stiffness, stupor, convulsions, muscle weakness, paralysis and, rarely, death. Serious West Nile virus illness is most often present in individuals 50 years of age or older.

Dr. Whitaker said individuals can reduce their risk of West Nile disease and other mosquito-borne diseases by taking these precautions:

  • 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, following the instructions on the label. Consult a physician before using repellents on young children.
  • Make sure doors and windows have tight-fitting screens. Repair or replace screens that have tears or other openings.
  • Eliminate all sources of standing water that can support mosquito breeding, including water in birdbaths, ponds, flowerpots, wading pools, old tires and any other receptacles.

For additional information about West Nile virus, people can call the department's West Nile virus toll-free line, (866) 369-9710), Monday through Friday from 8 a.m. to 5 p.m. or go to

[Illinois Department of Public Health news release]


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