Did you know the West Nile virus is the most common mosquito-borne disease that affects residents in Los Angeles County?

The District surveillance staff routinely collects samples of mosquitoes from traps and have them tested for mosquito-borne diseases. In addition, dead birds, which can carry the West Nile virus, are submitted for testing.

Keep in mind that the 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 the West Nile virus and any other viruses that can be a public health threat.

Human cases are reported by the L.A. County Department of Public Health and Pasadena Health Department.

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
Baldwin Park           2
Claremont               2
Glendora                 1
La Verne                 1
Pomona                  1
San Dimas              1
West Covina           2

West Nile Virus Positive Dead Birds

None reported at this time.

This information was obtained from the San Gabriel Valley Mosquito and Vector Control District.

About West Nile virus: https://www.sgvmosquito.org/west-nile-virus

How to get rid of mosquitoes: https://www.sgvmosquito.org/how-to-get-rid-of-mosquitoes

For more information, please visit their website at https://www.sgvmosquito.org.