<prompt> All of the following organisms cause gas gangrene EXCEPT:Clostridium DifficileClostridium WelchiClostridium SepticumClostridium Perfringens  <response>: Ans. a Clostridium DifficileRef: Microbiology by Ananthanarayan and Paniker 8th ed. 251, 263, 634 Gas gangrene is myonecrosis caused by bacterial infection which can further lead to toxemia and shock. It is noticed by the black sores and crepitus caused by gas nitrogen is the predominant gas component 74.5, followed by oxygen 16.1. Clostridium microbes which cause gas gangrene are: Clostridium perfringenswelchi Clostridium septicum Clostridium Novyi Clostridium Difficile causes acute enterocolitis. In a diabetic patient , the more likely pathogen of gas gangrene is Klebsiella pneumonia.Also KnowClostridium microbe that causes tetanus: Clostridium tetani Clostridium microbe that causes food poisoning: Perfringens type A- gastroenteritis Perfringens type C- Necrotising enteritis Botulinum- Botulism Difficle- Acute colitis 