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A dead crow found in Tracy was confirmed infected with West Nile Virus, the first sign of the pathogen in the Central Valley this year, the San Joaquin County Mosquito and Vector Control District found late Wednesday. Like most birds, crows live only five days after getting infected, she said. Bearden said vector control scientists find the virus a week earlier every year. Since the virus is heat-activated, she added, a few consecutive days of 100-degree weather in early
A dozen California counties have reported infected or dead animals because of the virus this year. The first recorded human case of the virus now endemic to the county was in summer 2004, when a man died from the avian infection. Two Central Valley residents, a horse and 158 birds have since died from it. Forty-one of those birds died in Tracy. More
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