Home Contra Costa County West Nile Virus Continues With More Dead Birds and Chickens

West Nile Virus Continues With More Dead Birds and Chickens

by ECT
CONCORD, CALIFORNIA – – The Contra Costa Mosquito & Vector Control District confirmed today that five more dead birds and two chickens tested positive for West Nile virus. Two birds were found in Concord and the other birds were found in Danville, Oakley and Pleasant Hill. The chickens were from Holland Tract, near Knightsen.
“It’s the time of year when mosquitoes become less picky about their blood source and they tend to bite people as well as birds,” said Steve Schutz, Ph.D., scientific program manager with the District. “West Nile virus is a disease of birds whose blood these mosquitoes normally prefer. But, as many birds are beginning to migrate and their young have left the nest, mosquitoes, desperate to reproduce before the weather starts growing cooler, will bite people if they are present. They require protein from blood in order to produce their eggs.”

Mosquito Samples: 4

nDate ReportedCityCross StreetsSpecies
17/11/16KnightsenHolland Tract AreaCx tarsalis
27/18/16AntiochCavallo Ave x Wilbur AveCx tarsalis
38/1/16ByronHolland Tract AreaCx tarsalis
48/1/16ByronByron Hwy x Rankin RdCx tarsalis

Dead Birds: 17

nDate ReportedCityCross StreetsSpecies
16/13/16AntiochPrewett Ranch Dr x Mokelumne DrAmerican Crow
27/11/16BrentwoodEden Plains Rd x Chestnut StWestern Scrub Jay
37/12/16AntiochMarigold Wy x Prewett Ranch DrAmerican Crow
47/13/16BrentwoodOak St x 2nd StAmerican Crow
57/25/16OakleyOakley Rd x Trenton StAmerican Crow
67/31/16BlackhawkDeer Meadow Dr x Live Oak DrAmerican Crow
78/1/16OakleyBig Bear Rd x Bernard RdWestern Scrub Jay
88/4/16AlamoStone Valley Rd x Alamo Glen DrAmerican Crow
98/7/16AlamoCamino Sobrante x Orinda WyAmerican Crow
108/8/16BrentwoodBalfour Rd x Fairview AveAmerican Crow
118/9/16ConcordGlazier Dr x Armand DrAmerican Crow
128/9/16AntiochLone Tree Wy x Deer Valley RdWestern Scrub Jay
138/18/16Pleasant HillGeary Rd x Pleasant Hill RdAmerican Crow
148/19/16OakleyLakespring Dr x Beaulieu LnWestern Scrub Jay
158/23/16DanvilleVerona Ave x Love LnAmerican Crow
168/24/16ConcordTreat Blvd x Oak Grove RdAmerican Crow
168/25/16ConcordMichigan Blvd x Washington BlvdAmerican Crow

Sentinel Chicken Flocks: 2

Note: Chickens do not die from West Nile virus. They develop antibodies to the virus which is detected in their blood.

#/10Date BleedArea
#1/108/1/16Holland Tract
#2/108/15/16Holland Tract
Visit the District’s website to learn of all West Nile virus activity in Contra Costa County this year, or to receive automatic adult mosquito fogging notifications should they be scheduled.
Residents are urged to help reduce their risk of contracting mosquito-borne diseases by following these guidelines:
  • Dump or drain standing water. Mosquitoes can’t begin their lives without water.
  • Defend yourself – use repellents containing DEET, Picaridin, or Oil of Lemon Eucalyptus.
  • Avoid being outdoors when mosquitoes are present, typically dawn and dusk.
  • Maintain neglected swimming pools . Just one can produce more than 1 million mosquitoes and affect people up to five miles away.
  • Report dead birds to the state hotline: 1-877-968-2473 or by visiting the California Department of Public Health’s website. All reports are crucial.

Since 2005, 55 people in Contra Costa County have been diagnosed with West Nile virus. In 2006, two people died from the disease. For a current list of West Nile virus activity this year, visit this page on the District’s website.  For human case information, please contact Contra Costa Health Services at 888-959-9911.

Contra Costa Mosquito & Vector Control District, an independent special district and public health agency, is located at 155 Mason Circle in Concord. Call the District to report mosquito problems at (925) 771-6195 or visit the office between 8:00 a.m. and 4:30 p.m. to get FREE mosquitofish for ornamental ponds, horse troughs or neglected swimming pools.

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