From the Concord, CA Patch
September 25, 2021
CONTRA COSTA COUNTY, CA — A second bird in Contra Costa County and another group of mosquitoes tested positive for West Nile Virus, county vector control officials said Friday.
The bird was found in San Pablo and the mosquitoes were in a trap in Oakley. It’s the first dead bird this year in San Pablo to have West Nile Virus.
So far this year in the county, two dead birds have been found with West Nile Virus as well as eight groups of mosquitoes.
Vector control officials said certain birds carry West Nile Virus and mosquitoes can become infected when they bite an infected bird. Mosquitoes spread the virus by biting another bird or a person.