The Aedes aegypti (the yellow fever mosquito), Aedes albopictus (the Asian tiger mosquito) and Aedes notoscriptus (the Australian Backyard Mosquito) have been detected in Orange County. All three invasive Aedes mosquitoes bite aggressively during the day and lay their eggs in small containers of water.
These mosquitoes are not native to California and can transmit Zika, dengue, chikungunya and yellow fever. There have been no recent cases of these viruses being transmitted locally in California.
Mosquito control is a shared responsibility. Every resident must redouble their efforts to eliminate ALL standing water from their property, including standing water found indoors. Residents must take responsibility for their own yards.
What to look for:
- Small, black mosquitoes with white stripes
- Mosquitoes that are active and bite during the day — even indoors!
- Immature mosquitoes (larvae and pupae) swimming in stagnant water.
What you need to know:
- Invasive mosquitoes must acquire the virus from an infected human. Example: Infected traveler returning from an area with active transmission of Zika.
- The California Department of Public Health acknowledges that the risk of transmission of Zika virus in California is low. Factors contributing to our lowered risk are the use of window screens, air conditioning, and comprehensive mosquito control and education programs.
- There is no cure for Zika. Mosquito breeding source elimination and bite prevention is the only way to prevent the spread of this virus.
- To see if you reside in a known Aedes infestation area, please view the map at the bottom of this page.
Mosquito Life Cycle
The invasive, black-and-white mosquitoes can lay their eggs individually along the waterline of any container. This reduces the effectiveness of “dump and drain!”
These mosquitoes can live and complete their life cycle either indoors or outdoors. Eggs are laid along the waterline of any water-holding container such as flower vases, plant saucers, buckets, used tires, and even plants that hold water like bamboo or bromeliads. Eggs can remain alive for years, and hatch into larvae when conditions are right.
For more information on the Aedes mosquito please click on one of the links belowFor English/Spanish/Vietnamese, click hereFor English/Korean/Mandarin, click here
Known Aedes Infestation Areas
Type in your address on the search bar on the top right corner of the map.
Red shaded area = Aedes aegypti mosquitoes have been detected
Yellow shaded area = Aedes albopictus mosquitoes have been detected
Blue shaded area = Aedes notoscriptus mosquitoes have been detected
No shade = Surveillance have not been performed in your area. Remain vigilant in making sure you have no standing water both inddors and outdoors. Discard containers, cans, buckets, and tires around the home.