Mosquito-Borne Diseases in Maricopa County 2022
Case numbers are updated every Friday around 9 a.m.
Confirmed and Probable Cases & Deaths as of 05/12/2022
Locally Acquired
Disease | Current Year Cases | Current Year Deaths | Cases Same Date Last Year | Deaths Same Date Last Year | 2021 Total Number of Cases |
---|
St. Louis Encephalitis (SLE) | 0 | 0 | 0 | 0 | 8 |
West Nile Virus (WNV)* | 9‡ | 1 | 2 | 0 | 1,484*
|
Unspecified Flavivirus (SLE/WNV)† | 0 | 0 | 0 | 0 | 12 |
*The number of WNV cases currently under review and pending classification is 5. This number is not reflected in the number of current cases above.
‡ Seven cases were reported in 2022 but occurred or had incubation periods in 2021
Travel-Related**
Disease | Current Year Cases | Current Year Deaths | Cases Same Date Last Year | Deaths Same Date Last Year | 2021 Total Number of Cases |
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Chikungunya | 0 | 0 | 0 | 0 | 0 |
Dengue | 0 | 0 | 2 | 0 | 8 |
Zika | 0 | 0 | 0 | 0 | 0 |
All data are provisional, based on date reported to Public Health.
Maricopa County weekly counts may vary slightly from state reporting due to differences in data reporting.
Current Year = 2022
Last Year = 2021
Disease Statistic Notes
** Travel-related cases are those in which 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.