Category Archives: Mosquito

Mosquitoes, dead birds, and a chicken test positive for West Nile Virus

The Contra Costa Mosquito & Vector Control District is reporting five dead birds, a group of mosquitoes, and a chicken that have tested positive for West Nile virus. In addition, the District received notice from public health officials that two … Continue reading

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Fogging for Adult Mosquitoes in Discovery Bay

Due to the detection of West Nile virus in mosquitoes in the area, the Contra Costa Mosquito & Vector Control District will be fogging by truck-mounted, ultra-low volume sprayers to control adult mosquitoes. DATE: Tuesday, August 1, 2017 TIME: Between … Continue reading

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July Means Heat and Heat Means Mosquitoes

Mosquitoes and heat go together like ice cream and cones, but not in a good way. Most mosquitoes, including the kind that can transmit West Nile virus, flourish in hot weather. They can develop from egg to adult in as … Continue reading

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Will You Spray my Yard for Mosquitoes?

A Closer Look at the District’s Residential Mosquito Service The District does not spray or fog residential yards for adult mosquitoes. Since mosquito problems are rarely limited to a single property, fogging for adult mosquitoes is usually conducted at a … Continue reading

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Why We Need Your Mosquito Sample

Swat a mosquito and save it for us If you are a Contra Costa County resident and are being bitten by mosquitoes, you can contact the District at 925-685-9301 or visit us online to request a free inspection. We need … Continue reading

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Dead Bird Hotline Open for Phone Reports

Dead Bird Reports Help Find Areas Where West Nile Virus May be Transmitted California’s statewide Dead Bird Hotline is open and accepting dead bird reports by telephone. Online reports are accepted year-round. The hotline is an important part of the … Continue reading

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Are There More Mosquitoes This year?

Mosquito counts at this time are higher than they have been during the past five years of drought in Contra Costa County. The drought produced fewer mosquitoes, but greater virus potential. This year there are plenty of water sources. Those, … Continue reading

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