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.
Keep in mind that West Nile virus is endemic to Los Angeles County. This means it is found naturally in our city environments. During warmer weather, the virus activity increases, which increases the chance for our traps to catch mosquitoes carrying West Nile virus and any other viruses that can be a public health threat.
2019 West Nile Virus Activity
West Nile Virus Positive Mosquito Samples
A sample is a random collection of 10-50 mosquitoes from a trap
|City/Community||Number of WNV+ Mosquito Samples|
West Nile Virus Positive Dead Birds
None reported at this time