Mosquitoes Positive for West Nile Virus in Bethel Island

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East County locations where West Nile has been located.
CONCORD, CALIFORNIA – – The Contra Costa Mosquito & Vector Control District confirmed today that a group of mosquitoes tested positive for West Nile virus in Bethel Island.
“Like the New York Yankees legend Yogi Berra said, “it ain’t over till it’s over,” said the District’s Scientific Program Manager Steve Schutz, Ph.D. “Mosquitoes are still present and the rain may help more to thrive if the weather stays warm. Remember to dump all standing water and to clean house gutters if they are clogged. House gutters can produce tens of thousands of mosquitoes.
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, 56 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.

Mosquito Samples: 11

nDate ReportedCityCross StreetsSpecies
17/11/16KnightsenHolland Tract AreaCx tarsalis
27/18/16AntiochCavallo Ave x Wilbur AveCx tarsalis
38/1/16KnightsenHolland Tract AreaCx tarsalis
48/1/16ByronByron Hwy x Rankin RdCx tarsalis
58/29/16Bethel IslandStone RdCx tarsalis
68/29/16Discovery BayByron Tract NWCx tarsalis
79/6/16ByronByron Hwy x Rankin RdCx tarsalis
89/6/16BrentwoodSycamore Ave x Garin PkwyCx tarsalis
99/19/16KnightsenHolland Tract AreaCx tarsalis
1010/3/16ByronByron Hwy x Rankin RdCx tarsalis
1110/24/16Bethel IslandStone RdCx tarsalis

Dead Birds: 33

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
178/25/16ConcordMichigan Blvd x Washington BlvdAmerican Crow
188/30/16ConcordTreat Blvd x Oak Grove RdAmerican Crow
198/31/16Pleasant HillHubbard Ave x Roberta AveWestern Scrub Jay
209/7/16AntiochTaylor Wy x Silveria WyAmerican Crow
219/7/16ConcordGlazier Dr x Mercer CtAmerican Crow
229/8/16ConcordDenkinger Rd x Wilson LnAmerican Crow
239/14/16ConcordBailey Rd x Clayton RdCalifornia Scrub Jay
249/16/16Walnut CreekPrimrose Ln x Peachwillow LnAmerican Crow
259/20/16MartinezMorello Ave x Morello Hills DrAmerican Crow
269/22/16ConcordClayton Rd x Bailey RdAmerican Crow
279/28/16ConcordMendocino Dr x Salem StAmerican Crow
2810/3/16DanvilleOld Farm Rd x Contada CirAmerican Crow
2910/4/16DanvilleGreen Valley Rd x Blemer RdAmerican Crow
3010/7/16Walnut CreekOak Grove Rd x Peachwillow LnAmerican Crow
3110/10/16Walnut CreekLos Felicias Ave x San Antonio DrAmerican Crow
3210/11/16Walnut CreekNaranja Dr x Walnut AveAmerican Crow
3310/11/16ConcordSunshine Dr x Meadow LnAmerican 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
2/107/18/16Oakley
1/108/1/16Holland Tract
2/10 8/15/16Holland Tract
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.