Mosquito Sample Taken In Yolo County Tests Positive For West Nile VirusA mosquito sample in Yolo County has tested positive for the West Nile virus, officials say.
3 Dead Scrub Jays Test Positive For West Nile Virus In Sacramento CountyVector control officials say the first dead birds of the season with West Nile virus have been confirmed in the Sacramento region.
First Human Case Of West Nile Virus Confirmed In Yolo CountyHealth officials have confirmed the first human case of West Nile Virus in Yolo County.
Mosquitoes Carrying St. Louis Encephalitis Virus Found In LodiMosquitoes carrying St. Louis Encephalitis (SLE) virus have been found in Lodi. 
Heatwave Causing Spike In West Nile Virus Mosquitoes In Sacramento ValleyVector control is warning that the sustained hot weather is causing mosquito populations to multiply - with West Nile virus activity now seeing a spike.
Mosquito Sample In Placer County Tests Positive For West Nile VirusVector control officials say a mosquito sample in Placer County has tested positive for West Nile virus.
Elevated Risk Of West Nile Virus In Sutter County After Second Sample Of Mosquitoes Test PositiveThere is now an elevated risk of West Nile Virus in Sutter County after a second sample of mosquitoes has tested positive, the Sutter-Yuba Mosquito and Vector Control District announced on Friday.
2 Men Confirmed With West Nile Virus In Stanislaus CountyTwo human cases of West Nile Virus have been confirmed in Stanislaus County, officials said on Monday.
Mosquito Sample Taken Near Elk Grove Tests Positive For West Nile VirusA mosquito sample from Elk Grove has tested positive for West Nile virus - the first positive test of the season for the area.
First Dead Bird Of The Season Tests Positive For West Nile VirusThe first bird of the season has tested positive for West Nile virus, the Sacramento-Yolo Mosquito and Vector Control district confirmed. 
Placer County Sprays Rocklin And Roseville For West Nile VirusA plane began aerial spraying over parts of Roseville and Rocklin Wednesday evening.