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Scientists from the U.S. Geological Survey (USGS) in Madison, Wisc., said today that two dead crows, found near Milwaukee, are being re-tested for the West Nile Virus. Preliminary tests showed that one of the birds had the virus. Results for the second bird are inconclusive and that bird is being retested. So far this year, West Nile Virus has been identified in 18 states, the District of Columbia