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

Published Sept. 9, 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.

“We are experiencing an average West Nile virus season in the county with 62 positive mosquito samples out of 1,659 samples tested,” said Joel Buettner, General Manager. “Mosquito season may be coming to a close with cooler weather on the horizon, but we recommend residents stay vigilant by protecting themselves from bites by using repellents with EPA-registered ingredients.”

Across the state, human cases of West Nile virus have been reported but this is the first human case to be reported in Placer County this season. The Placer Mosquito and Vector Control District has continued aerial and ground-based mosquito treatments in and around Roseville, Lincoln and western Placer agricultural areas throughout the season. Residents are encouraged to report all dead birds on westnile.ca.gov or by calling 1-877-WNV-BIRD (968-2473). 

More information about West Nile virus and how to prevent it can be found at placermosquito.org/west-nile-information

The Placer Mosquito and Vector Control District advises the public to implement the 3 Ds of protection to protect themselves from West Nile virus:

  • Drain or dump any standing water that may produce mosquitoes on your property.
  • Defend yourself and your home by using mosquito repellents with an EPA-registered ingredient, dress protectively when outside and make sure screens on doors and windows are in good condition.
  • Contact the District for any additional help controlling mosquitoes around your home.  

For more information, Placer Mosquito and Vector Control District can be reached at (916) 380-5444, placermosquito.org or [email protected]