West Nile Virus Activity in San Diego County 

Mosquito Larvae

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.

Learn more about West Nile virus here

Vector Control Program staff monitor WNV by trapping, batching, and testing mosquitoes and by testing dead birds.

Current WNV activity is given below.

Current WNV Activity

 Source  Number of Positives to Date (2021)
Birds 0
Mosquito Batches 0
Horses 0
Humans 0
Total Source Positives 0


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