text: <unk>  gangrene is caused by mixed aerobic and anaerobic organisms which normally exist below the pelvic diaphragm in the perineum and genitalia.<unk>  gangrene may be caused by the following organisms:
option_0: Fournier gangrene causes
option_1: Gangrene causes
option_2: Fournier gangrene risk factors
option_3: Lymphedema causes
option_4: Erysipelas causes
option_5: Cutaneous abscess causes
option_6: Deep vein thrombosis causes
option_7: Secondary peritonitis causes