What diseases can mosquitoes spread in Ohio? Eastern equine encephalitis virus Information from the Ohio Department of Heath Information from the CDC La Crosse encephalitis virus Information from the Ohio Department of Heath Information from the CDC West Nile virus Information from the Ohio Department of Heath Information from the CDC Information for Healthcare Providers What diseases can mosquitoes spread outside the United States? Dengue Information from the CDC Plan for Travel Information for Healthcare Providers Mosquito Bite Prevention for Travelers (CDC) Mosquito Bite Prevention for Travelers, Spanish (CDC) Malaria Information from the CDC Preventing Malaria while Traveling Insect Repellent Recommendations (EPA) Malaria Prevention by Country Yellow Fever Information from the CDC Yellow Fever Vaccine Yellow Fever Prevention by Country Zika Virus About Zika Zika Prevention and Transmission (CDC) Zika Basics and How to Protect Yourself (CDC) Zika Basics and How to Protect Yourself (CDC-Spanish) Sexual Transmission of Zika Virus for Healthcare Providers (CDC)