Media Releases
First Human Case of West Nile Virus Reported in Placer County This Season
Placer County and the Placer Mosquito and Vector Control District Urge Residents to Protect Themselves from Mosquito Bites ROSEVILLE, Calif., September 10, 2021 – Placer County’s interim health officer, along with the Placer Mosquito and Vector Control District, encourage residents to take precautions to avoid mosquito bites, after a human case of West Nile virus was reported in Roseville today. [...]
First West Nile Virus Positive Mosquitoes of the Season Detected in Westpark
The Placer Mosquito and Vector Control District confirmed the first mosquito sample to test positive for West Nile virus in the county for the 2021 season. The mosquitoes were collected in a mosquito trap in western Placer County near the Westpark neighborhood of Roseville. The District’s vector and disease surveillance program traps and tests mosquitoes weekly throughout the county. The [...]
West Nile Virus Antibodies Detected in Sentinel Chicken – First Sign of Virus in Placer County
The Placer Mosquito and Vector Control District reported today that a sentinel chicken has tested positive for West Nile virus antibodies. This is the first sign of increased West Nile virus activity in Placer County.
West Nile Virus and Mosquito and Vector Control Awareness Week April 19-25, 2015
Mosquito control districts throughout the state are gearing up for what could be an unpredictable and unusual season. The Placer Mosquito and Vector Control District is enlisting the public’s help to slow down the West Nile virus cycle this season.
Warm, Dry Winter Sees Unseasonal Mosquito Activity
The Placer Mosquito and Vector Control District reports an increase in calls from Placer County residents, especially on the western border, where mosquito activity has increased in the past few weeks.





