Mosquito-Borne Diseases

While not all mosquitoes carry diseases, they are capable of spreading many, such as:

  • Chikungunya Virus
  • Dengue Virus
  • Eastern Equine Encephalitis 
  • Jamestown Canyon Virus
  • La Crosse Encephalitis


  • Malaria 
  • St. Louis Encephalitis 
  • West Nile Virus 
  • Yellow Fever
  • Zika Virus

Use the resources below to learn how to prevent mosquito bites and about what diseases they spread.

CDC Image

Recent Updates


  • August 11th: WHO detailed that an unusual dengue surge is occurring in Bangladesh. With 69,483 confirmed cases and 327 deaths, the case fatality rate (0.47%) is higher compared to previous years.
  • August 26th: The Florida Department of Health issued a mosquito-borne illness alert after additional detections of locally acquired dengue cases. As of August 26, the state's total number of locally acquired cases for the year is 16.

West Nile Virus

  • August 18th: WI DHS reported Wisconsin's first human West Nile Virus case of 2023.


  • August 29th: CDC issued a 2nd malaria alert after a Maryland case was locally infected by plasmodium falciparum, the most severe form of the disease. This form can be severe and fatal if not promptly diagnosed and treated.

Eastern Equine Encephalitis

Print | Sitemap
© Western WI Public Health Readiness Consortia

This website was created using IONOS MyWebsite.