From KRON4
September 3, 2021
CONCORD, Calif. (KRON) – The first dead bird in 2021, in addition to more mosquitoes, have tested positive for West Nile virus, according to the Contra Costa Mosquito and Vector Control District.
A California scrub-jay was found in Brentwood and the mosquitoes were nearby in Discovery Bay.
This year in Contra Costa County, five groups of mosquitoes and now one dead bird have tested positive for the virus.
Officials say some birds carry the virus and if a mosquito bites the bird and becomes infected, the mosquito can spread it to another bird or person.