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West Nile Virus

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Female mosquito biting human

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.

                 Watch WNV Public Service Announcement

                         New EPA Information on Insect Repellents

Services                       WNV Activity Update     
Report Dead BirdsWNV Cases in San Diego County
Report Mosquito PoolsWNV Press Releases
Mosquito Fish Distribution LocationsWatch "Local WNV Survivor Story"
Request Educational Materials 
Request Presentation 


General Information       Prevention                    
WNV HistoryHow to Protect Yourself
Frequently Asked QuestionsMosquito Prevention
Mosquito InformationGreen Swimming Pools
Clinical InformationMosquito Fish
Horse InformationAerial Larvicide Application
EPA Information on Insect Repellents 


Resources                    Other Languages          
Educational MaterialsEspañol                  Cambodian
WNV Public Service AnnouncementFrancais                 Laos                 
Watch "Stop West Nile Virus" VideoTagalog                  Chinese           
 Russian                  Tiêng Viêt  
 Português              Somali

             Annual Vector Control Program Report 2009-2010

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

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