First Sign of West Nile Virus in Marin County in 2015

Release date: 
Jun 12
The Marin/Sonoma Mosquito & Vector Control District (MSMVCD) has confirmed finding the first dead bird infected with West Nile virus (WNv) in 2015 in Marin County. One American crow was collected from Novato, in the vicinity of Dusel Ct.
"Dead birds can be our first indicators of virus in an area and a valuable tool for protecting public health. We encourage the public to report dead birds to the West Nile virus hotline at 1-877-968-2473 or online at," stated Sarah Brooks, Lead Biologist for the Marin/Sonoma Mosquito and Vector Control District. For more information, please visit our website at   


District staff will continue to trap, test, and monitor the abundance of adult mosquitoes in the area and perform control operations as necessary. Vector control technicians are inspecting the area for unknown sources of mosquito production as well as checking all existing sources.


Residents are urged to continue to report mosquito problems in their area and to reduce mosquito production sites in their yards by removing standing water on a regular basis. Additionally, residents should use personal protection measures against mosquito bites. Wearing long sleeved shirts, long pants and applying an effective repellent to exposed skin will help reduce the risk of WNv transmission from an infected mosquito.


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

  • Report mosquito problems or any area that could be producing mosquitoes at or 1-800-231-3236.
  • Stock backyard ponds or other permanent, contained 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