Invasive Aedes Mosquitoes


Aedes aegypti (the yellow fever mosquito) and Aedes albopictus (the Asian tiger mosquito) have been detected in the County of San Diego. These mosquitoes are not native to California and can transmit the viruses that cause Zika, dengue, chikungunya, and yellow fever. There have been no recent cases of these viruses being transmitted locally in California. Aedes notoscriptus (the Australian Backyard Mosquito) has also been detected in San Diego. All three invasive Aedes mosquitoes bite aggressively during the day and lay their eggs in small containers of water.



2020 Invasive Aedes Mosquito activity in San Diego County: 

Map of Aedes Findings to date in 2019

(Click map to expand)

Aedes mosquito activity for prior years is available here

Help Fight The Bite, watch this short video to learn how! (Spanish version)

Prevent mosquito breeding

Every week, dump out and clean containers holding water (indoors as well as outdoors)

Invasive Aedes mosquito eggs can survive without water for several months

Fill plant saucers with sand or fine gravel so pools of water do not form


If collecting rainwater, make sure rain barrel remains securely screened/sealed to prevent mosquito breeding

Female mosquitoes can fly over 30 feet through a narrow pipe (or down a gutter) to find water

Aedes mosquitoes prefer to lay eggs in small containers like plant saucers, discarded tires, buckets, watering cans and flower vases that hold water (indoors and outdoors).


Protect yourself


Put screens on windows and doors

Invasive Aedes mosquitoes can live and breed inside homes

Wear long sleeves and pants

Invasive Aedes mosquitoes are aggressive biters both indoors and outdoors, especially during the day.

Apply insect repellent containing DEET, oil of lemon eucalyptus, picaridin, or IR3535 to exposed skin (always use as directed on product label)

Window Screen Installation

Report possible Aedes activity

Report mosquito bites received during the day

Invasive Aedes mosquitoes are black with white stripes on the legs and back

Report mosquitoes matching the description above

email photographs to  

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Aedes albopictus_feeding on human host

Contact Vector Control:

 (858) 694-2888