Due to the detection of the invasive species Aedes aegypti mosquito in the area, the Contra Costa Mosquito and Vector Control District (District) will be using truck-mounted, wide-area larvicide application…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) confirms seven birds and one group of mosquitoes have tested positive for West Nile virus (WNV) so far…
SANTA CLARA COUNTY, CALIF. — The first two human cases in 2026 of West Nile virus in Santa Clara County residents have been reported to the County of Santa Clara…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) confirms a young American crow from El Cerrito is the first bird to test positive for West Nile…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) confirms mosquitoes collected from a trap on Holland Tract this week are the third group of mosquitoes from…
CONCORD, CA – The Contra Costa Mosquito and Vector Control District (District) confirms a group of mosquitoes collected from a trap in Knightsen are the first mosquitoes to test positive…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) confirms a California scrub jay from San Ramon is the first bird to test positive for West Nile…
On this first day of spring, after some rain this week, and with increased temperatures next week, we may see a return of the mosquitoes that can transmit West Nile…
WITH RECENT RAIN LEAVING STANDING WATER IN FRONT AND BACKYARDS…its time to dump and scrub to prevent mosquitos in Contra Costa County It appears as if the rain has stopped,…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) confirms more of the invasive mosquito species Aedes aegypti have been found this week at various locations in…
California is experiencing an increase in diseases spread by mosquitoes, including West Nile virus and dengue. Californians can protect themselves by preventing mosquito bites and getting rid of standing water…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports two more groups of trapped mosquitoes and one more dead bird have tested positive for West Nile…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports two more groups of trapped mosquitoes and one dead bird have tested positive for West Nile virus…
The Contra Costa Mosquito and Vector Control District announced that due to the high number of mosquitoes and the detection of West Nile virus in the area, the Contra Costa…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports two more dead birds have tested positive for West Nile virus (WNV) in Contra Costa County. The…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports the first dead bird of the year has tested positive for West Nile virus (WNV) in Contra…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports two more groups of trapped mosquitoes, nine more dead birds, and two more sentinel chickens have tested…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports four more groups of trapped mosquitoes and four more dead birds have tested positive for West Nile…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports 11 more dead birds and three more groups of trapped mosquitoes have tested positive for West Nile…
CONCORD, CA – The Contra Costa Mosquito and Vector Control District (District) reports 11 more dead birds and three more groups of trapped mosquitoes have tested positive for West Nile…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) is reporting one chicken from the District’s sentinel chicken flock on Holland Tract, near Knightsen, and two chickens…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports five more dead birds and two more groups of trapped mosquitoes have tested positive for West Nile…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports the first dead bird of the year has tested positive for West Nile virus (WNV) in Contra…
CONCORD, CALIFORNIA – The Contra Costa Mosquito and Vector Control District (District) reports two groups of mosquitoes have tested positive for West Nile virus (WNV) in Contra Costa County. The…
CONCORD, CA – The Contra Costa Mosquito & Vector Control District (District) reports a group of mosquitoes has tested positive for West Nile virus (WNV) in Contra Costa County. The…