Mosquito & Vector-Borne Diseases

Even here in the dry climate of Maricopa County, mosquito breeding occurs. Unfortunately, with our mosquitoes have come mosquito-related diseases. The best thing each of us can do to protect ourselves (PDF) and our families from these diseases is to prevent getting bit by mosquitoes and to eliminate breeding sites on our own property.

Mosquito-Borne Diseases in Maricopa County 2017

Residents 2017 Confirmed and Probable Cases as of May 18, 2017
Disease Total Number of Cases Number of Deaths
Chikungunya* 0 0
Dengue* 0 0
West Nile Virus 0 0
Zika 1 0
St. Louis Encephalitis Virus 1 0
Flavivirus (Unspecified) † 0 0

Disease Statistic Notes

  • * To date, Maricopa County has only experienced imported cases of Chikungunya, Dengue and Zika, meaning that residents brought the disease in from other places.
  • Flavivirus (Unspecified) indicates an infection that could not be attributed to a single mosquito-borne disease.
  • All data are provisional / Based on date reported to Public Health.
Additional data from prior years may be found on the ADHS Mosquito-Borne Disease webpage.