West Nile Virus


West Nile virus (WNV) is a disease transmitted to humans, birds, horses, and other animals, by infected mosquitoes. Mosquitoes get the disease from feeding on infected birds and can later pass it on when they bite animals or humans.

WNV is established in San Diego County and can be found in all 58 counties in California! The virus was first isolated in the West Nile district of a Northern Province in Uganda in 1937. It was first detected in the United States in New York City in 1999. From there, the virus spread westward, arriving in California in 2003. West Nile virus is now the most prevalent mosquito-borne disease in the United States.

The Vector Control Program protects communities and the environment by controlling mosquitoes that can transmit diseases to humans.


Adult Mosquito Treatment Information


Click below to report: 

      A Dead Bird       Mosquito Breeding      A Green Swimming Pool


In the News

Mosquitofish, the Mosquito's Worst Nightmare 

Zika Case Confirmed in San Diego County 

Zika Virus

Zika Virus and San Diego County; What You Should Know

For more information on Zika virus click here

Current West Nile virus Statistics

State of California WNV webpage


Programs & Services                        

General Information         


Report Green Swimming Pools Frequently Asked Questions
Report Mosquito Breeding Clinical Information
Mosquito Fish Distribution Locations Horse Information
Vector Habitat Remediation Program EPA Information on Insect Repellents
WNV Activity Updates      Prevention                                        

WNV Cases in San Diego County

Mosquito Prevention

Aerial Larvicide Application

Green Swimming Pools


Mosquito Fish




Pamphlet Library "Go Blue, Not Green!" Video
Request Educational Materials "Stop West Nile Virus" Video Part 1
Request a Presentation "Stop West Nile Virus" Video Part 2
SD Swat Team Kid's Page - NEW GAMES "Local WNV Survivor Story"
Geocaching "Lucha Contra la Picadura del Zancudo" Video
QR Codes "WNV Prevention" PSA (New!)
  "WNV Protection" PSA (New!)
Team Fight the Bite Geocaches

"WNV Reporting" PSA (New!)

"WNV - Prevent, Protect, Report" Video (New!)



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For More Information On 
WNV Or Other Vectors Contact: 
(858) 694-2888  
SD Fight the Bite Homepage