Mosquito-Borne Diseases

Mosquitoes are more than just a summer nuisance—they can carry viruses that pose serious health risks, including West Nile virus, Zika, dengue, and malaria. South Dakota sees West Nile virus activity every year, and staying informed is key to prevention. This page offers factsheets, testing guidelines, prevention tips, and up-to-date surveillance data to help you reduce your risk and take action to protect yourself, your family, and your community.

Prevention Tip: Wear insect repellent, drain standing water, and stay indoors during peak mosquito hours (dawn and dusk).