Piperacillin compared with cefuroxime plus metronidazole in diffuse peritonitis.

: Eighty-five patients were randomly allocated to receive either piperacillin (n = 38) or cefuroxime plus metronidazole (n = 45) after surgical treatment of diffuse peritonitis; 78 were evaluable. A mean of 1.5 (piperacillin group) and 1.7 (cefuroxime/metronidazole group) pathogens/patient were identified. Twenty-seven patients (71%) were successfully treated in the piperacillin group compared with 29 (64%) in the cefuroxime/metronidazole group. These data suggest that piperacillin was neither better nor worse than cefuroxime/metronidazole in diffuse, secondary peritonitis.