Health Officials Expect Active West Nile Season

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Contra Costa County Mosquito and Vector Control District technician... News PhotoCalifornia,Healthcare And Medicine,Horizontal,Larva,Looking,Mosquito,Pleasant Hill,Technician,USA,Waist Up,Water,West Nile VirusPhotographer Collection: Getty Images News 2012 Getty ImagesPLEASANT HILL, CA - JUNE 29: Contra Costa County Mosquito and Vector Control District technician David Wexler looks for mosquito larvae in a water sample from a creek on June 29, 2012 in Pleasant Hill, California. As reports of mosquitoes with West Nile virus are increasing across the country and several people have been confirmed to be infected by the potentially dangerous disease, the Contra Costa County Mosquito and Vector Control District is testing mosquito larvae found in standing water throughout the county and is using mosquito fish and BVA Larvacide oils to eradicate the pest. (Photo by Justin Sullivan/Getty Images)