More Mosquitoes Test Positive For West Nile Virus in Sonoma County

Release date: 
Jul 24

Cotati, CA.-The Marin/Sonoma Mosquito & Vector Control District (MSMVCD) has confirmed two more West Nile virus (WNv) positive mosquito samples. Both mosquito samples were collected in the vicinity of Asti Road and Citrus Fair Drive in Cloverdale. 


"Everyone can help in the fight against West Nile virus by reporting mosquito problems and encouraging others to take protective measures against mosquitoes", stated Eric Engh, Education Program Specialist for the Marin/Sonoma Mosquito & Vector Control District. "Please visit our website at to learn more about West Nile virus, stressed Engh.   


In order to reduce the number of mosquitoes and break the virus transmission cycle, adult and larval mosquito control operations have been conducted in the area, and disease surveillance efforts will continue. 



Simple ways to help reduce exposure to mosquitoes and lessen the risk of WNv:

  • Check septic tank lids to ensure a tight seal, repair cracks and screen vent pipes using a fine mesh screen (1/16 of an inch).
  • Report mosquito problems, neglected swimming pools, or any area that could be producing mosquitoes at or 1-800-231-3236.
  • Stock backyard ponds or other permanent water features with mosquitofish. 
  • Report dead birds to the West Nile virus hotline at 1-877-968-2473 or online at
  • Wear mosquito repellent when outdoors at dusk and dawn. Use a repellent containing one of the following active ingredients: DEET, Picaridin, oil of lemon eucalyptus, or IR3535. 
  • Residents interested in staying informed about district activities are encouraged to follow MSMVCD on twitter and facebook.