Contra Costa Mosquito & Vector Control
Fight the NEW Bite — Stop the Invasion
West Nile virus is already endemic in Contra Costa County. What we do not want are new mosquitoes capable of transmitting Zika, dengue fever, chikungunya, or Yellow Fever viruses here in Contra Costa County. And right now, these mosquitoes are only two counties away, so the time is now to get the word out on how to prevent these new invasive mosquitoes.
Spreading CCMVCD 2018 message: Fight the NEW Bite — Stop the Invasion. https://conta.cc/2M8R3kH
The Contra Costa Mosquito & Vector Control District reports mosquitoes from two locations in Contra Costa County have tested positive for West Nile virus.
The infected mosquitoes were caught in traps in Discovery Bay and an agricultural area east of Brentwood. The District uses this information to direct prevention and control efforts within the vicinity.
The confirmation of infected mosquitoes comes less than one week after the District confirmed chickens tested positive for antibodies against West Nile virus near Knightsen.
“We are seeing a typical summer pattern where West Nile virus activity starts in the warmer areas of the Central Valley and gradually moves west into Contra Costa County as our weather warms up.” said Steve Schutz, Ph.D., scientific programs manager.
Hot weather speeds both virus growth and mosquito development, and serves as an important reminder to residents to defend themselves against West Nile virus and other mosquito-borne illnesses.
“Detection of virus in mosquitoes and sentinel chickens is an indication that the risk of human cases is increasing, so people spending time outdoors should take precautions to prevent mosquito bites,” said Schutz.
The District encourages residents to reduce their risk of contracting West Nile virus and other mosquito-borne diseases by:
- Defending yourself – use repellents containing DEET, Picaridin, or Oil of Lemon Eucalyptus.
- Avoiding the outdoors when mosquitoes are present, typically dawn and dusk.
- Dumping or draining standing water to prevent mosquitoes. Most mosquitoes can’t start their lives without water.
The District also urges the public to report dead birds.
Please click here for the Four Steps to take if you find a dead bird.
“Usually we detect West Nile virus in dead birds first, but this year we’ve been getting very few dead bird reports from the public, so we haven’t had many to test,” said Schutz.
Ravens, jays and crows can be susceptible to the virus, and may die if infected. The District asks residents who find a dead bird to report it to the statewide West Nile Virus Hotline online or by calling (877) WNV-BIRD (968-2473). Dead birds can be important evidence of West Nile virus in the county.
For a list of Contra Costa County’s 2018 West Nile virus activity and locations, visit the District’s website.