Mosquitoes found in two locations in eastern Contra Costa County have been tested positive for the West Nile virus.
The infected mosquitoes were found in traps at Discovery Bay and in an agricultural area east of Brentwood and come less than a week after chickens near Knightsen were tested positive for antibodies against the virus, according to the Contra Costa Mosquito and Vector Control District.
"We observe a typical summer pattern in which the West Nile virus activity begins in the warmer parts of the central valley and gradually shifts to the Contra Costa district as the weather warms," said Steve Schutz, head of the scientific program of the district declaration.
District officials encourage people to reduce their risk of becoming infected with the West Nile virus by using insect repellent, while at dusk and dawn, when mosquitoes are most prevalent, stay out and stagnant water Brood mosquitoes, get rid of them.
Residents are also encouraged to report dead birds, which may be a sign of West Nile virus. If you find a dead bird, please call (877) WNV-BIRD.
Since 2005, 63 County residents have been diagnosed with the West Nile virus and two people died of the disease in 2006.
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