SACRAMENTO — As director of the emergency room at University of California Medical Center, Robert Derlet always wondered what made people sick. Each summer, on hiking trips into the high Sierra, he brought that curiosity along, asking himself: Where do you get infections in the wilderness? The most obvious possibility, he believed, was the water.
http://www.modbee.com/2010/05/08/1158938/fouled-waters-sierra-lakes-streams.html