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CONCORD, CALIFORNIA - The Contra Costa Mosquito and Vector Control District (District) confirms an American crow from Walnut Creek has tested positive for West Nile virus (WNV) in Contra Costa County, making this the second West Nile virus-infected bird this year.
The bird was reported to the California WNV Call Center. Subsequent testing confirmed the crow was infected with WNV. Alameda, Santa Clara, and Solano Counties have also reported infected birds so far this year.
“Our recent hot weather can increase the risk of West Nile virus, as the heat allows mosquitoes to develop from egg to adult more quickly. So, another dead bird infected with West Nile virus is a good reminder for residents to take steps to reduce the risk of mosquitoes.”, said Steve Schutz, Ph.D., Scientific Program Manager.
To reduce the risk of mosquitoes, the District recommends Contra Costa County residents dump out any amount of standing water at least once per week. And if, after dumping out all of the water on the property, the resident still experiences mosquito issues, Contra Costa County residents can contact the District to request mosquito service.
To reduce the risk of mosquito bites, the District recommends residents use EPA-registered insect repellents with one of the following active ingredients:
- DEET
- Picaridin
- The repellent version of Oil of Lemon Eucalyptus
- IR3535
Always follow the instructions on the label when using insect repellent. And report dead birds because dead birds are often the first sign of WNV in a particular location.
Contra Costa County residents can report dead birds by phone at (877) WNV-BIRD (968-2473) or online. County residents can also request mosquito service for residential property by calling (925) 685-9301 or online.
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