Health officials in Nashville, Tennessee, have confirmed the detection of West Nile virus in a mosquito sample collected in North Nashville, marking the first positive finding of the virus in the area for 2026.The infected mosquito pool was found near Cass Street, prompting local public health authorities to issue warnings and step up monitoring efforts.

Officials noted that the detection represents the earliest positive mosquito sample of the season and follows increased West Nile virus activity observed in 2025, when at least one human case was confirmed in the city.

The Metro Public Health Department (MPHD) has responded by increasing mosquito surveillance, distributing educational materials in affected neighborhoods, and applying larvicide treatments in standing water areas where mosquito breeding is likely.

Authorities emphasized that while the presence of infected mosquitoes does not necessarily mean human cases will follow, it serves as an early indicator that the virus is circulating locally.West Nile virus is considered the leading mosquito-borne illness in the United States, according to the Centers for Disease Control and Prevention.Most infected individuals do not develop symptoms, but about 20% may experience fever, headaches, body aches, gastrointestinal issues, or rash.

In rare cases—less than 1%—the virus can cause severe neurological disease, particularly in older adults and individuals with weakened immune systems.

Public health officials are urging residents to take preventive steps, including eliminating standing water around homes, using EPA-approved insect repellents, wearing protective clothing during peak mosquito activity at dawn and dusk, and ensuring window and door screens are intact.Residents can also request backyard inspections to identify mosquito breeding sites.

Officials stress that community cooperation is essential to reduce mosquito populations and limit the spread of mosquito-borne diseases during the warmer months.