First Sign of West Nile Virus in Marin County in 2016

Release date: 
Jun 24

Cotati, CA. -The Marin/Sonoma Mosquito & Vector Control District (MSMVCD) has confirmed finding the first dead bird infected with West Nile virus (WNv) in 2016 in Marin County. The dead bird, an American crow, was collected from San Rafael in the vicinity of Smith Ranch Road and Yosemite Road. 

"This positive dead bird is an early indicator that there is virus activity in Marin County," said Nizza Sequeira, Public Relations Director for the Marin/Sonoma Mosquito and Vector Control District. "We encourage the public to take this threat seriously and employ personal protection measures when engaging in outdoor activities," stated Sequeira. 

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 all documented sources of mosquito production as well as checking for new sources.

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 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.