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The Season Begins: First Mosquitoes Test Positive for West Nile Virus in DuPage County
Posted on: 6/3/2019

The first mosquitoes to test positive for West Nile virus in Illinois for 2019 were identified on May 21 in DuPage County. 

While no human cases of West Nile virus have been reported in Illinois so far this year, patients must not become complacent. In 2018, the Illinois Department of Public Health reported 176 human cases, including 17 deaths
West Nile virus is transmitted through the bite of a Culex pipiens mosquito, commonly called a "house mosquito." Mosquitoes first pick up the virus by feeding on an infected bird.


Common symptoms include:

  • Fever
  • Nausea
  • Headache
  • Muscle aches 

However, four out of five people infected with West Nile virus will not show any symptoms. 

The Illinois Department of Public Health recommends that residents wear insect repellent and remove standing water around their homes.

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