A “brain-eating amoeba” called Naegleria fowleri has been found in recreational waters at several national parks across the U.S. West this year.
Scientists took 185 samples from Yellowstone National Park, Grand Teton National Park, Olympic National Park, Newberry National Volcanic Monument and Lake Mead National Recreation Area, finding the rare organism in about a one-third of them, according to the U.S. Geological Survey and its partner agencies.
