<prompt> ;Gas; in the tissue should be differenciates withPseudomyxoma peritoneiPseudomonas infectionClostridium nouyiNon clostridial infection  <response>: .clostridial organisms can cause Extensive necrosis of muscle with production of gas hydrogen sulphide; nitrogen; carbon dioxide which stains the muscle brown or black. Usually muscle is involved from origin to inseion. Often may extend into thoracic and abdominal muscles. When it affects the liver it causes necrosis with frothy blood--foaming liver, is characteristic..Non clostridial gas producing organisms like coliforms can also cause gas .gangrene. ref:SRB;S manual of surgery,ed 3,pg no 45 