Cephalothin, cefoxitin, or metronidazole in elective colonic surgery?

Abstract
A randomized controlled trail aimed at comparing the individual efficacy of cephalothin, cefoxitin and metronidazole in the prevention of postoperative wound infection was performed among 74 colorectal surgical patients. Of 28 patiens on cephalothin, 7 (25%) developed a postoperative infection, but among 23 patients in each of the other 2 groups, only 1 (4%) in each group became infected. These results confirm the primary importance of anaerobes in the causation of postoperative sepsis after colorectal surgery.