According to the North Carolina Department of Health and Human Services, "once symptoms start, the disease progresses rapidly and usually causes death within about five days."
CDC and public health officials in several states are investigating a multistate outbreak of E. coli and Salmonella infections linked to alfalfa sprouts.
The amoeba thrives in freshwater bodies around the U.S. and can enter the body through the nose. The infection it produces is almost always fatal. There are, on average, fewer than 10 cases annually.
An 8-year-old has died after contracting a rare brain-eating amoeba believed to have been contracted while swimming in a lake near her home, her family and health officials said. CNN's Meg Tirrell reports.