Nor does the DSM-5 place any arbitrary time limit on ordinary grief, in the context of bereavement â another issue widely misrepresented in the general media, and even by some clinicians.
Gas gangrene is commonly caused by infection with the bacterium Clostridium perfringens, which develops in an injury or surgical wound that's depleted of blood supply. The bacterial infection produces toxins that release gas â hence the name gas gangrene â and cause tissue death.
Types of gangrene. 1  Dry gangrene. 2  Dry gangrene is characterized by dry and shriveled skin ranging in color from brown to purplish-blue to black. 3  Dry gangrene may develop slowly. 4  It occurs most commonly in people who have a blood vessel disease, such as atherosclerosis.