Associated Press
FILE - In a Thursday, Aug. 16, 2012 file photo, dead mosquitos are lined up waiting to be sorted at the Dallas County mosquito lab in Dallas. Federal health officials said Wednesday, Aug. 29, 2012 that West Nile virus cases are up 40 percent since last week and may rival the record years of 2002 and 2003. (AP Photo/LM Otero, File)

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