Mosquito & Vector-Borne Diseases
To learn more about each mosquito-borne disease, find its name below.
Mosquito-Borne Diseases in Maricopa County 2019
Confirmed and Probable Cases & Deaths as of 9/12/2019
|Disease||Current Year (2019) as of 09/12/2019||Last Year (2018) as of 09/12/2018||2018 Total Number of Cases|
|St. Louis Encephalitis (SLE)||5||0||0||0|
|West Nile Virus (WNV)||143||13||13||24|
|Unspecified Flavivirus (SLE/WNV)†||1||0||0||1|
|Unspecified Flavivirus (Dengue/Zika)†||1||0||0||0|
All data are provisional, based on date reported to Public Health.
Disease Statistic Notes
* To date, Maricopa County has only experienced travel-related cases of chikungunya, dengue and Zika, meaning that residents brought the disease in from other places or passed on the disease during birth as the result of infection acquired during travel.
† Unspecified Flavivirus Opens a New Window. indicates an infection that could not be attributed to a single mosquito-borne disease.
Find annual summary numbers of mosquito-borne diseases in Maricopa County, including the number of human deaths attributed to them .
Additional mosquito-borne disease data may be found on the Arizona Department of Health Services' Mosquito-Borne Disease webpage.