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First mosquitoes test positive for West Nile Virus this year

File Photo Studstill Media

SPRINGFIELD – The Illinois Department of Public Health has confirmed the first mosquitoes to test positive for West Nile virus in Illinois for 2021. The first batch to test positive was found in Skokie. No human cases of West Nile virus have been reported so far this year. 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.
“We are starting to see West Nile virus make its annual appearance,” said Illinois Department of Public Health Director Dr. Ngozi Ezike. “Remember 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.”
In 2020 the IDPH reported 39 human cases (although human cases are underreported), including four deaths.
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. 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, encephalitis, or even death, can occur. People older than 60 and individuals with weakened immune systems are at higher risk for severe illness from West Nile virus.
Additional information about West Nile virus can be found on the IDPH website.

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