West Nile Virus cases and positive tests on the rise across multiple counties
Several regions across the United States have reported positive cases of West Nile Virus (WNV) in mosquitoes and humans in 2024. In Lincoln County, Mississippi, a mosquito sample has tested positive, bringing the county's total to five. Additionally, there are human cases reported in Rankin and Harrison counties. Statewide, Mississippi has identified 71 positive mosquito samples, with 49 in Harrison County. Residents are advised to take precautions, such as using mosquito repellent and eliminating standing water.
In Oregon, Jackson County has confirmed its first WNV-positive mosquito sample for the year, joining Morrow and Malheur counties. The virus was detected in northeast Central Point. While most infected individuals are asymptomatic, about 20% may develop flu-like symptoms. Efforts to control the mosquito population are ongoing, including disrupting their life cycle to prevent further spread.
Boston, Massachusetts, has recorded its first positive mosquito samples for WNV this summer in Jamaica Plain, Roslindale, Roxbury, and West Roxbury. Although there are no confirmed human cases in Boston, the Boston Public Health Commission emphasizes preventive measures like using EPA-approved insect repellents and avoiding outdoor activities during peak mosquito activity times.
New Jersey has reported its first human cases of WNV for 2024, with infections in Union and Middlesex counties. These cases appeared earlier than usual, which is typically between mid-August and mid-September. Health officials recommend public safety measures to reduce mosquito bites. The state has also seen a significant concentration of positive mosquito samples in northeastern and central regions.
Rockland County, New York, has experienced a surge in WNV-positive mosquito pools, with about half of the samples submitted in the last two weeks testing positive. No human cases have been reported this season, but the health department advises eliminating standing water to control the mosquito population.
In Georgetown, Texas, truck-mounted spraying is planned following positive WNV mosquito samples collected on July 23. The city is implementing Integrated Mosquito Management practices, including enhanced monitoring and public outreach to reduce the mosquito population.
Kansas is also at high risk for WNV, particularly in central and northwest regions. The Kansas Department of Health and Environment reports that while the number of confirmed cases remains low, the virus is spreading, especially during wet periods. Residents are encouraged to wear protective clothing and use DEET-based repellents to minimize the risk of infection.
