Placer Mosquito urges residents to protect themselves from mosquito bites with EPA-registered repellent

SHERIDAN, Calif., July 11, 2024 – The Placer Mosquito and Vector Control District confirmed the first mosquito sample to test positive for West Nile virus in the county for 2024. The mosquitoes were collected in Sheridan, a rural area in northwest Placer County.

The District traps and tests mosquitoes for West Nile virus weekly throughout the county during the summer. The District uses the test results to assess the risk of West Nile virus transmission to people, inform the public and make preventative or responsive vector control treatments in the most safe, timely and effective way possible to protect public health in Placer County.

“Although this is our first detection of West Nile virus in the county this year, we anticipate more West Nile virus detections as the hot weather sustains in the coming weeks,” stated Joel Buettner, Placer Mosquito District Manager. “We encourage residents to wear an EPA-registered repellent to protect themselves from mosquito bites while we enhance our surveillance efforts and schedule treatments to help lower the risk of disease transmission to people.”

West Nile virus is a potentially serious illness transmitted through the bite of a female mosquito and there is no cure. The best way to avoid West Nile virus is to prevent mosquito bites with an EPA-registered repellent, dump and drain standing water on your property to prevent mosquito breeding and if you think you have a mosquito problem, submit a problem report on the District website.

For more information, contact the Placer Mosquito and Vector Control District at (916) 380-5444 or Follow the District on Facebook, Twitter, Instagram and TikTok: @placermosquito. For a list of EPA-registered repellents, please visit or