PLACER COUNTY, Calif. — The first case of West Nile Virus has been detected in a mosquito in Placer County this year. The Placer County Mosquito and Vector Control District confirmed the mosquito was ...

Local health agencies have already found virus-positive mosquitoes in Sacramento, Kern, Tulare, and Santa Clara counties, according to the California West Nile Virus program. No human cases have been ...

Placer County is the second county in the capital region where a mosquito sample has tested positive for the disease this season.