Continued Risk of West Nile Virus in Contra Costa County as More Mosquitoes Test Positive


Infected Mosquitoes Found in Brentwood and Discovery Bay

The Contra Costa Mosquito & Vector Control District (District) has confirmed three more groups of mosquitoes have tested positive for West Nile virus (WNV) in Contra Costa County. Two groups of mosquitoes were trapped in Brentwood and one group was collected in Discovery Bay. The positive mosquitoes from Brentwood were collected during District surveillance following last week’s Adult Mosquito Control efforts in Brentwood. Preliminary results suggest the treatment appears to have been effective, but the risk of WNV remains.
So far this year, a total of 11 groups of mosquitoes have tested positive for WNV in Contra Costa County. In past years, the District has confirmed WNV in mosquitoes well into October, so it’s important for county residents to remember, Labor Day is not the unofficial end of WNV season.
“As Contra Costa County traditionally stays warm into October, we could continue to see WNV for several more weeks. So, it’s not time to put your guard down when it comes to mosquitoes. Use precautions to reduce the risk of mosquito bites and report dead birds because those reports can help direct our surveillance and control efforts,”said the District’s Scientific Program Director Steve Schutz, Ph.D.
Contra Costa County residents can reduce the risk of mosquito bites and WNV by:
  • Dumping or draining standing water. Mosquitoes develop from egg to adult in water.
  • Defending yourself – use repellents containing DEET, Picaridin, or Oil of Lemon Eucalyptus
  • Keeping swimming pools chlorinated and filtered because just one neglected pool can produce up to 1 million mosquitoes and affect people several miles away
  • Avoiding the outdoors when mosquitoes are present, typically dawn and dusk
  • Reporting dead birds to the state hotline by phone at (877) WNV-BIRD (968-2473) or online

About Kevin

Mayor - City of Oakley, Manager of Mainframe Operations and Optimization – USS-POSCO INDUSTRIES, Co-Founder and Board Member - Friends of Oakley A Community Foundation, Commissioner - Contra Costa Transportation Authority, Board Member - Tri Delta Transit, Transplan, San Joaquin Joint Powers Authority and RD 2137, Advisory Board – Opportunity Junction
This entry was posted in Uncategorized. Bookmark the permalink.

1 Response to Continued Risk of West Nile Virus in Contra Costa County as More Mosquitoes Test Positive

  1. William A. Carpenter says:

    West Nile Virus can infect Pets if bitten by an infected mosquito. No evidence they can get it from just eating or carrying an infected animal.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s