Acute Communicable
Disease Control


Contact Information
County of Los Angeles
Department of Public Health
Acute Communicable Disease Control
313 N. Figueroa Street, #212
Los Angeles, CA 90012
Phone: (213) 240-7941
Fax: (213) 482-4856

Call 211 For Information 24/7

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Acute Communicable Disease Control
(Back to Zika main page)
Zika Transmission and Mosquito Control

There are several ways that Zika virus can spread to people (transmission). The primary way that Zika spreads is through bites of infected mosquitoes.

Mosquito Bites

Zika primarily spreads from the bites of a special type of mosquito, Aedes mosquitoes. These mosquitoes can bite anytime, day or night. While Aedes mosquitoes have been found in Los Angeles County, we have not found any mosquitoes infected with Zika virus. These mosquitoes typically lay eggs along the edges of standing water in items such as buckets, bowls, animal dishes, flower pots, and vases. Theses mosquitoes can live indoors and outdoors and can bite anytime (during the day and night). These mosquitoes become infected with Zika when they bite a person already infected with the virus and can then spread the virus to other people through bites.

Other Methods of Transmission
  • From mother to child: A pregnant woman can pass Zika virus to her fetus during pregnancy. To date, there are no reports of infants getting Zika through breastfeeding.
  • Through sex: A person infected with Zika can pass the virus during unprotected sex. For additional information on sexual transmission of Zika VISIT.
  • Through blood transfusions: To date, there have not been any confirmed Zika cases due to blood transfusions in the US.

Reporting Mosquito Problems

Acute Communicable Disease Control is responsible for monitoring and addressing human health problems in Los Angeles County but does not manage mosquito control activities. This important action is under the control of the county’s five independent mosquito control (abatement) districts. Beyond our county, the Health Departments of Long Beach and Pasadena also operate their own mosquito control programs. Please see Special Report: Zika Community Engagements Meetings for more information about mosquito control activities.

To report a potential mosquito breeding situation, please contact the appropriate Mosquito Abatement District or city public health department:

Antelope Valley
(661) 942-2917
Greater Los Angeles
(562) 944-9656
L.A. County West
(310) 915-7370
City of Long Beach
(562) 570-4132
Compton Creek
(310) 933-5321
San Gabriel Valley
(626) 814-9466
City of Pasadena
(626) 744-6005
Orange County
(714) 971-2421

Additional information is available at

Find your Mosquito Abatement District by zip code here

Do you know who to call: Mosquito Districts in LA  flyer

To report potholes or street problems with water accumulation, contact the appropriate city utility; if the problem is in an unincorporated area, please contact the Los Angeles County Department of Public Works.

Additional Resources


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