title: Treatment of pseudomembranous colitis with oral metronidazole after relapse following vancomycin.
mesh_terms: D003015:Clostridium Infections / Q000188:drug therapy*; D004761:Enterocolitis, Pseudomembranous / Q000188:drug therapy* / Q000209:etiology; D006801:Humans; D008297:Male; D008795:Metronidazole / Q000627:therapeutic use*; D008875:Middle Aged; D014640:Vancomycin / Q000627:therapeutic use
chemical_list: D008795:Metronidazole; D014640:Vancomycin