Even here in the dry climate of Maricopa County, mosquitoes are a problem. Mosquitoes are small insects that breed in standing water and the female mosquitoes need blood to lay eggs. Sometimes mosquitoes carry germs (e.g., viruses and parasites) that can be spread to a person when the mosquito bites them. Preventing mosquitoes from breeding and avoiding mosquito bites are the best ways to avoid getting these diseases.
All data are provisional; based on date reported to Public Health.
Disease Statistic Notes
* To date, Maricopa County has only experienced imported (travel-related) cases of chikungunya, dengue and Zika, meaning that residents brought the disease in from other places. † Unspecified Flavivirus indicates an infection that could not be attributed to a single mosquito-borne disease
Weekly seasonal and annual summary numbers of mosquito-borne diseases, including the number of human deaths attributed to them, can be foundhere.