CONTRA COSTA COUNTY, Calif. - Two more dead birds and two more groups of trapped mosquitoes have tested positive for West Nile virus in Contra Costa County, according to the county's Mosquito and ...

BRENTWOOD, Calif. (KRON) – Two more groups of mosquitoes tested positive for West Nile Virus, according to the Contra Costa Mosquito and Vector Control District. Both groups were collected in eastern ...

West Nile virus was detected in central Contra Costa County, the Contra Costa Mosquito and Vector Control District said Monday. The district said a California scrub jay in San Ramon tested positive ...

An American crow from Walnut Creek is the second bird to test positive for West Nile virus, the Contra Costa Mosquito and Vector Control District said Friday. Birds are the main reservoir for the ...

CONTRA COSTA - Two more dead birds and two more groups of trapped mosquitoes have tested positive for West Nile virus in Contra Costa County, according to the county's Mosquito and Vector Control ...

More dead birds and mosquitoes are testing positive for West Nile virus in east, west and central Contra Costa County, according to the county's Mosquito and Vector Control District. Five more dead ...