<prompt> Gastro-intestinal enteritis necroticans caused by:CI difficileCI. perfringensBotulinumC jejuni  <response>: Necrotizing enteritis enteritis necroticians, or pig bel is caused by β toxin produced by type C strains of C.perfringens following ingestion of a high protein meal in conjunction with trypsin inhibitors by a susceptible host who has limited intestinal proteolytic activity. Source of organism is patient own intestinal flora.Clinical featuresAcute abdominal pain, diarrhea, vomiting, shock and peritonitis, 40 of patient die.Pathological studies shows an acute ulcerative process of the bowel restricted to small intestine. 