Because of the presence of gas-forming organisms, subcutaneous air is classically described in necrotizing fasciitis. This may be seen only on radiographs or not at all.
The bacteria that cause necrotizing fasciitis can be passed from person to person through close contact, such as touching the wound of the infected person. But this rarely happens unless the person who is exposed to the bacteria has an open wound, chickenpox, or an impaired immune system .
Necrotizing fasciitis is a term that describes a disease condition of rapidly spreading infection, usually located in fascial planes of connective tissue that results in tissue necrosis (dead and/or damaged tissue). Fascial planes are bands of connective tissue that surround muscles, nerves, and blood vessels. Fascial planes can bind structures together as well as allow body structures to slide over each other effectively. The disease occurs infrequently, but it can occur in almost any area of the body. Although many cases have been caused by group A beta-hemolytic streptococci ( Streptococcus pyogenes ), most investigators now agree that many different bacterial genera and species, either alone or together (polymicrobial infections), can cause this disease. Occasionally, mycotic (fungal) species cause necrotizing fasciitis. Popular publications and the media term necrotizing fasciitis as a "flesh eating" or "skin eating" disease or infection. In addition, the organisms that typically cause necrotizing fasciitis are termed "flesh-eating bacteria" or "flesh-eating parasites" because of the rapid rate with which they can infect and kill human tissue.
WebMD explains the causes, symptoms, and treatment of necrotizing fasciitis (flesh-eating bacteria), an infection that causes tissue death at the infection ...
Necrotizing fasciitis research paper