A North Carolina teenager is critically ill from a rare brain-eating amoeba, Naegleria fowleri, that's found in warm freshwater, state health officials said.

A North Carolina teenager is critically ill from a rare brain-eating amoeba, Naegleria fowleri, that's found in warm freshwater, state health officials said.

Fewer than 10 people a year are infected in the U.S. but the condition is usually fatal