Scientists are calling for urgent action on free-living amoebas—a little-known group of microbes that could pose a growing global health threat. Here's what you need to know.

If the phrase “brain-eating amoeba” sounds like something out of a sci-fi horror movie, you’re not alone. In Arizona, it’s a very real concern that lurks in warm fresh water during the hottest months.

Naegleria fowleri, commonly called the brain-eating amoeba, is a rare but serious threat in warm freshwater during hot months. The amoeba enters through the nose and travels to the brain, causing a ...