Officials at the University of Minnesota's Raptor Center are alarmed at the number of birds they've seen with symptoms of west nile virus. Until a year ago, only about a dozen bird species were known to be hosts to the virus, primarily crows and blue jays. But the National Wildlife Health Center now estimates between 110 and 120 bird species have been infected. The Raptor Center's Dr. Patrick Redig says it seems like the most recent epidemic got its foothold in southern Ohio, and then advanced quickly to the Midwest. Redig says its too early to determine the extent of the West Nile outbreak in Minnesota's bird population: