Did you know West Nile virus is the most common mosquito-borne disease that affect residents in Los Angeles County?
The District surveillance staff routinely collects samples of mosquitoes from traps and have them tested for a mosquito-borne diseases. In addition, dead birds, which can carry West Nile virus, are submitted for testing.
2018 West Nile Virus Activity
West Nile Virus Positive Mosquito Samples
West Nile Virus Positive Dead Birds