Second Dead Bird Tests Positive for West Nile Virus in Marin County

Release date: 
Jun 28

Cotati, CA -The Marin/Sonoma Mosquito and Vector Control District (MSMVCD) has confirmed that a second dead bird has tested positive for West Nile virus (WNV) in Marin County this year. The bird, an American crow, was found near Alameda Del Prado and Calle Arboleda in Novato.

"The unseasonal rain and sudden rise in temperature increases the potential for elevated levels of mosquito production and virus activity," said Nizza Sequeira, Public Relations Director for MSMVCD. Residents need to check for, and eliminate additional standing water that may have accumulated after the recent rainfall.
Sequeira stated that the two most important things residents need to remember are to report mosquito problems and use personal protection measures against mosquitoes.  Mosquito problems can be reported online at www.msmosquito.comor by calling 1.800.231.3236. 

   Simple ways to help reduce exposure to mosquitoes:

  • Eliminate standing water in rain barrels, old tires, buckets, kiddie pools or any other item that can hold water for more than a week.
  • Report mosquito problems, neglected swimming pools, or any area that could be producing mosquitoes.
  • Stock backyard ponds or other permanent water features with mosquitofish.The fish are free and can be delivered or simply picked up at the District office.
  • Report dead birds to the West Nile virus hotline at 1-877-968-2473.
  • Wear mosquito repellentwhen 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.

West Nile virus is a mosquito-borne disease that is spread by the bite of an infected mosquito. Mosquitoes become infected when they feed on infected birds. Infected mosquitoes can then spread the disease to humans and other animals.

Less than 1% of people (about 1 in 150) infected with WNV develop serious illness. These cases may last for extended periods of time, result in permanent neurological damage and may be fatal.  

Approximately 20% of people (about 1 in 5) infected with WNV experience mild symptoms that may include fever, headache, body aches, nausea, rashes, swollen lymph nodes and vomiting. Approximately 80% of people (about 4 out of 5) infected with WNV do not show any symptoms.

 For more information or to report mosquito problems contact the Marin/Sonoma Mosquito and Vector Control District at 1.800.231.3236 or visit

Report dead birds to the West Nile virus Hotline at 1-877-968-2473 or online at

The Marin/Sonoma Mosquito and Vector Control District is an independent special district committed to protecting public health from mosquitoes and vector-borne disease. All programs and services are funded through benefit assessments and property taxes. Services are provided to all residents in Marin and Sonoma counties.