Thousands of hurricane survivors who spent hours trapped in or wading through floodwaters likely exposed themselves to a wide range of bacteria and other contaminants. Microbiologist Paul Pearce found total sewage bacteria in a water sample from in New Orleans' Ninth Ward to be 45,000 times what would be considered safe for swimming in a pond or a lake. The Ninth Ward was one of the city's hardest-hit neighborhoods. "In terms of total microorganisms in floodwater, this is about as bad as it can get," Pearce told ABC News. Pearce also found 2.2 million parts per unit of human waste...