Health officials in Nashville are advising residents to take precautions against mosquito bites following the detection of West Nile virus in local mosquitoes for the first time this year. The Metro Public Health Department (MPHD) reported that the virus was found in a mosquito pool near Cass Street in North Nashville, marking the earliest positive sample of the season. In 2025, health officials noted elevated West Nile virus activity, with one confirmed human case.
Dr. Sanmi Areola, director of health at MPHD, emphasized the community's role in reducing mosquito populations to prevent mosquito-borne diseases. The Centers for Disease Control and Prevention states that West Nile virus is the leading mosquito-borne disease in the U.S., with most infected individuals not showing symptoms. However, about 20% may experience symptoms such as fever and body aches, while less than 1% could develop serious neurological issues, particularly affecting older adults and those with weakened immune systems.
MPHD routinely traps and tests mosquitoes during the summer to monitor for West Nile virus activity. A positive test indicates that the virus is present in the area but does not guarantee that residents will become infected. In response to the recent detection, MPHD is distributing educational materials, increasing mosquito trapping, monitoring standing water, and applying larvicide as necessary. The department does not use insecticides to eliminate adult mosquitoes.
Residents can request a free inspection from the Pest Management team to identify potential mosquito breeding sites. Recommendations for reducing mosquito populations include eliminating standing water in containers, trimming vegetation, and using EPA-approved insect repellents. These measures aim to lower the risk of West Nile virus and other mosquito-borne illnesses in the community.