Mosquito

The Des Plaines Valley Mosquito Abatement District collected a positive mosquito batch on May 31 from River Forest and North Shore Mosquito Abatement District collected a positive mosquito batch on June 5 in Evanston.

SPRINGFIELD — The Illinois Department of Public Health has confirmed the first mosquitoes to test positive for West Nile virus in Illinois for 2020.

The Des Plaines Valley Mosquito Abatement District collected a positive mosquito batch on May 31 from River Forest and North Shore Mosquito Abatement District collected a positive mosquito batch on June 5 in Evanston.

No human cases of West Nile virus have been reported so far this year.

“While we continue to battle the COVID-19 pandemic, we must also remember to take steps to protect our health from other illnesses,” said IDPH Director Dr. Ngozi Ezike. “Getting outdoors is a great way to combat being cooped up, but you need to take precautions to protect yourself from mosquitoes and the viruses they carry by wearing insect repellent and getting rid of standing water around your home.”

Monitoring for West Nile virus in Illinois includes laboratory tests for mosquito batches, dead crows, blue jays, robins and other perching birds, as well as testing sick horses and humans with West Nile virus-like symptoms. People who see a sick or dying crow, blue jay, robin or other perching bird should contact their local health department, which will determine if the bird will be picked up for testing. West Nile virus is transmitted through the bite of a Culex pipiens mosquito, commonly called a house mosquito, that has picked up the virus by feeding on an infected bird.

The first mosquitoes to test positive for West Nile virus in 2019 were collected on May 21, 2019 in Wayne, Illinois. Last year, 46 counties in Illinois reported a West Nile virus positive mosquito batch, bird and/or human case. IDPH reported 28 human cases (although human cases are underreported), including one death.

Precautions to Fight the Bite include practicing the three “R’s” – reduce, repel, and report.

Reduce

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.

Eliminate, or refresh each week, all sources of standing water where mosquitoes can breed, including water in bird baths, ponds, flowerpots, wading pools, old tires, and any other containers.

Repel

When outdoors, wear shoes and socks, long pants and a light-colored, long-sleeved shirt, and apply an EPA-registered 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.

Report

Report locations where you see water sitting stagnant for more than a week such as roadside ditches, flooded yards, and similar locations that may produce mosquitoes. The local health department or city government may be able to add larvicide to the water, which will kill any mosquito larvae.

Additional information about West Nile virus can be found on the IDPH website, dph.illinois.gov.

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