Seminole County confirms locally acquired dengue case, increases mosquito control

The Florida Department of Health in Seminole County (DOH-Seminole) confirmed a human case of locally acquired dengue in Seminole County on October 21, 2026. In response, DOH-Seminole and Seminole County Mosquito Control are coordinating surveillance, prevention, and control efforts to address the situation.

As of an update on October 26, 2026, these agencies are conducting active treatment measures, including increased ground fogging and larviciding activities. Mosquito Control staff continue to monitor local mosquito populations and disease-vector activity. Treatment efforts are adjusted based on current surveillance data and public health information.

Residents are encouraged to take specific precautions to prevent mosquito bites and reduce the risk of mosquito-borne illnesses. Officials recommend draining standing water from buckets, flowerpots, birdbaths, toys, and other containers where water can collect. When outdoors, residents should cover exposed skin by wearing long sleeves, long pants, socks, and shoes.

Additionally, individuals should use insect repellent registered with the U.S. Environmental Protection Agency (EPA), following all label instructions. To keep mosquitoes out of homes, residents are advised to repair damaged screens on windows, doors, porches, and patios.

Florida residents are also encouraged to report dead birds to the Florida Fish and Wildlife Conservation Commission as part of ongoing statewide surveillance for mosquito-borne illnesses.

For more information, residents can visit the DOH-Seminole website at https://seminole.floridahealth.gov/2026/10/21/doh-seminole-issues-mosquito-borne-illness-advisory/. To learn more or ask questions, contact DOH-Seminole at 407-665-3243. Mosquito-borne illness surveillance reports are also available for public review.