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.

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Recent Updates


  • November 2nd: California confirmed their 2nd local dengue case.
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