The Southern 7 Health Department (S7HD) has confirmed a fourth positive test for West Nile Virus (WNV) in mosquitoes in 2024, with the most recent case detected in Union County. The S7HD Environmental Health Services reported the positive result on August 15 after collecting mosquitoes in traps set across the southern seven counties of Illinois. Earlier positive tests had been recorded in Alexander, Hardin, and Johnson counties in July. Fortunately, no human cases of WNV have been reported in the region this year.
West Nile Virus is transmitted through the bite of a Culex pipiens mosquito, commonly referred to as a house mosquito, which becomes infected after feeding on an infected bird. The virus can cause various symptoms, including fever, nausea, headaches, and muscle aches, though the majority of those infected (about four out of five people) do not exhibit symptoms. However, in rare cases, WNV can lead to severe illness, such as meningitis, encephalitis, or even death. People over the age of 60 and those with weakened immune systems are at a higher risk for these serious outcomes.
To combat the spread of West Nile Virus, the S7HD urges residents to follow the "Three R’s" strategy: Reduce, Repel, and Report. Residents can help reduce mosquito breeding grounds by eliminating sources of standing water around their homes, such as bird baths, ponds, flowerpots, and old tires. Additionally, they should ensure that windows and doors have tight-fitting screens. When outdoors, it is recommended to wear light-colored clothing and apply insect repellent containing DEET, picaridin, or oil of lemon eucalyptus. Lastly, residents are encouraged to report any stagnant water locations to local authorities, as these areas may require treatment with larvicide to prevent mosquito development.
Mosquito trapping will continue through early fall. For more information, contact Miranda Adams, S7HD Environmental Health Services Director, at 618-634-2297 ext. 973114, or visit www.southern7.org
