West Nile Virus Persists – More Mosquitoes, A Bird, Chickens Test Positive

Press Release from Contra Costa MVCD
September 21, 2018

Dump Standing Water and Avoid Mosqito Bites as Temperatures Rise 
CONCORD, CALIFORNIA – The Contra Costa Mosquito & Vector Control District is reporting mosquitoes from Quimby Island and Bethel Island, a dead bird from Oakley, and chickens from Martinez and Oakley have tested positive for West Nile virus.  This is the first West Nile virus activity from Bethel Island this year. 
So far in 2018, 17 groups of mosquitoes, 12 dead birds, and 15 chickens  from Contra Costa County have tested positive for the virus.  
According to the District’s Scientific Programs Manager Steve Schutz, Ph.D., “Even though today is technically the last day of summer, there is warm weather in the forecast which means West Nile virus season is not over. West Nile virus replicates faster in warm weather, so county residents should continue to dump standing water to prevent mosquitoes and wear repellent to prevent mosquito bites.”    
The Centers for Disease Control and Prevention (CDC) recommend repellents containing DEET, Picaridin, or Oil of Lemon Eucalyptus. Residents can also avoid mosquito bites by  staying indoors when mosquitoes can be present. Mosquitoes that can transmit West Nile virus are most active at dawn and dusk.

Most mosquitoes can’t start their lives without water, and so dumping out standing water prevents mosquitoes from having a place to develop.

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