General Information

Contact Dept

  • Phone:
    (559) 600-3200
  • Address:
    1221 Fulton Mall
    Fresno, CA 93721
  • Email Department

a summary
Last Updated by Patrick Barnett
  Mosquito Borne Illnesses
Required caption by Patrick Barnett

The yellow fever mosquito, Aedes aegypti, has been detected in Fresno County by the Consolidated Mosquito Abatement District.

This mosquito is not native to California and is an efficient carrier of diseases such as dengue, yellow fever, and chikungunya. No illnesses associated with this mosquito have been reported so far.

Aedes aegypti is a small, dark mosquito with white markings and banded legs. It may be active around dusk and dawn but bites most often during the day and often bites indoors.

To assist in the effort to eradicate this mosquito population and to reduce the risk of being bitten by mosquitoes, Fresno County residents who live in valley communities are urged to: Report mosquito bites received during the day. Also report any mosquitoes which match the description above. Call the Consolidated Mosquito Abatement District toll-free at 1-800-821-1577. Please see flyers below for more information from the Consolidated Mosquito Abatement District .

Public Health Alert.pdf (English)    Aviso de Salud Publica.pdf

  Heard the Buzz Brochure English  Español  Hmoob

 Buzz Graphic



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In response to the investigation of West Nile Virus, local mosquito and vector control agencies have intensified mosquito control activities. Individuals can further reduce their risk of mosquito-borne diseases by taking these precautions:
  • Avoid activity outside when mosquitoes are most active, especially at dawn and dusk. 
  • When outdoors, wear long pants; long sleeve shirts and other protective clothing. 
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  • Apply insect repellant according to label directions. 
  • Make sure that doors and windows have tight fitting screens. Repair or replace screens that have tears or holes. 
  • Eliminate all sources of standing water that can support mosquito breeding.

Many species of birds get infected and die from West Nile Virus. The public can assist the California Department of Public Health (CDPH) extensive monitoring effort for the virus by reporting any crows, ravens, magpies, and jays that have been dead for less than 24 hours. CDPH has established a toll-free line for public reporting:

877-WNV-BIRD (877-968-2473)

Fresno County has set guidelines for the disposal of dead birds that are found. The guidelines can be found here: Guidelines for Dead Bird Disposal Here are some links to view the birds most commonly affected by West Nile Virus:

  Educational Resources
California’s West Nile Virus Website
This site provides the most current surveillance information for the State of California and
all of Fresno County.

California Department of Food and Agriculture – Equine West Nile Virus Information 

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Here is a colorful slide presentation prepared by one of our Epidemiologists. This PowerPoint style presentation is can help answer many questions regarding West Nile Virus. Click here to see the presentation