West Nile Virus Update - Marin & Sonoma Counties

Release date: 
Sep 6

 

Cotati, CA-The Marin/Sonoma Mosquito & Vector Control District (District) announced today a sentinel chicken from Cloverdale has tested positive for West Nile virus (WNV) antibodies. The location of the chicken coop where the blood sample was taken is in the vicinity of Asti Road and Citrus Fair Drive in Cloverdale. This is the second sentinel chicken to test positive for anitbodies in Marin and Sonoma counties this year.

 West Nile virus activity has been steadily increasing over the past several months. See the chart below for all 2013 WNV activity in Marin and Sonoma Counties.

 

 

2013 West Nile Virus Activity in Marin & Sonoma Counties

  

County

Humans

Horses

Dead Birds

Mosquito Pools

Sentinel Chickens

Dead Squirrels

Marin

1

 0

4

0

1

0

Sonoma

0

 0

9

0

1

0

 

  

  

WNV Positive Dead Birds

 

Date

County

City

Address

Species

5/29/2013

Marin

San Anselmo

Redwood Road x Floribel Avenue

American Crow

6/18/2013

Marin

Novato

Alameda Del Prado X Calle Arboleda

American Crow

7/17/2013

Sonoma

Santa Rosa

Yulupa Ave X Midway Drive

American Crow

7/19/2013

Sonoma

Santa Rosa

Aptos Court X Pacific Heights Drive

American Crow

7/22/2013

Sonoma

Cotati

Scriver Court X Ford Lane

Barn Owl

7/25/2013

Sonoma

Santa Rosa

Pepperwood Preserve Road  X Franz Valley Road

Red-tailed Hawk

7/26/2013

Sonoma

Santa Rosa

Jennings Avenue X Manhattan Way

American Crow

7/26/2013

Sonoma

Santa Rosa

Sussex Drive X Old Redwood Hwy

American Crow

7/31/2013

Sonoma

Santa Rosa

Sebastopol Road X N. Wright Road

American Crow

8/9/2013

Marin

Novato

Betty Lane X Center Road

Western Scrub-Jay

8/12/2013

Marin

Novato

Grant Ave X 3rd Street

American Crow

8/19/2013

Sonoma

Windsor

Apollo Place X Wilson Lane

Western Scrub-Jay

8/26/2013

Sonoma

Santa Rosa

Sequoia X Chatham Drive

Western Scrub-Jay

 

 

Sentinel Chickens- WNV Seroconversions

(tested positive for WNV antibodies)

 

Date

County

City

Location

8/7/2013

Marin

Novato

Gage Lane X Indian Valley Road

8/26/2013

Sonoma

Cloverdale

Asti Road X Citrus Fair Drive

 

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

  • Eliminate standing water in rain barrels, old tires, buckets, kiddie pools or any other item that can hold water for more than 72-96 hours. 
  • Check septic tank lids to ensure a tight seal and repair any visible cracks.
  • Screen septic tank vent pipes using a fine mesh screen.
  • Report mosquito problems, neglected swimming pools, or any area that could be producing mosquitoes at www.msmosquito.com or 1-800-231-3236.
  • 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 or online at www.westnile.ca.gov.
  • 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.

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 (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.

 

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.   

    

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