LAKE, MCHENRY, GALLATIN COUNTIES COLLECT WEST NILE VIRUS POSITIVE MOSQUITO SAMPLES

LAKE, MCHENRY, GALLATIN COUNTIES COLLECT WEST NILE VIRUS POSITIVE MOSQUITO SAMPLES

Clarke Mosquito Control collected mosquito samples in Libertyville on June 21 and McHenry on June 23. The Egyptian Health Department in Shawneetown in Gallatin County confirmed a positive mosquito sample June 30. A total of 36 batches of mosquitoes and three birds have tested positive for West Nile virus throughout the state in 14 counties since surveillance began May 1. No human cases have been reported.

In 2004, 62 of the state’s 102 counties were found to have a West Nile positive bird, mosquito, horse or human case. A total of 60 human cases of West Nile disease, including four fatalities, were reported last year in Illinois.

Surveillance for West Nile virus includes laboratory tests on mosquitoes, dead crows and blue jays, and the testing of sick horses and humans with West Nile-like disease symptoms. 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.

In 2002, the state led the nation with 884 human cases, including 66 deaths, and West Nile activity was reported in 100 of 102 counties. In 2003, 75 of the state’s 102 counties reported West Nile activity and there were 54 human cases of the mosquito-borne disease, including one fatality. Public health officials believe that a hot summer, like that of 2002, could increase mosquito activity and the risk of disease from West Nile virus.

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.

Only about two persons out of 10 who are bitten by an infected mosquito will experience any illness. Illness from West Nile disease 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. Use prevention methods whenever mosquitoes are present.
When outdoors, wear shoes and socks, long pants and a long-sleeved shirt, and apply insect repellent that includes DEET, picaridin or oil of lemon eucalyptus 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. In communities where there are organized mosquito control programs, contact your municipal government to report areas of stagnant water in roadside ditches, flooded yards and similar locations that may produce mosquitoes.

Additional information about West Nile virus can be found on the Department’s Web site at www.idph.state.il.us/envhealth/wnv.htm or people can call the West Nile Virus Hotline at 866-369-9710 Monday through Friday from 8 a.m. to 5 p.m.