Necrotizing fasciitis is a rare infection that's often described in media reports as a condition involving "flesh-eating bacteria." It can be fatal if not treated promptly.
Necrotizing fasciitis spreads quickly and aggressively in an infected person. It causes tissue death at the infection site and beyond.
Every year, between 600 and 700 cases are diagnosed in the U.S. About 25% to 30% of those cases result in death. It rarely occurs in children.