Peroperative systemic prophylaxis in colorectal surgery.

In an effort to reduce infection rates in elective colorectal surgery to acceptable levels without oral non-absorbable antimicrobials, using only a short course of systemic antimicrobials, 50 patients were studied in a multicentre trial. Each patient received metronidazole for anti-anaerobic coverage. The anti-aerobic coverage consisted of netilmicin, cefuroxime or placebo, administered in a double-blind manner. Five out of 36 evaluable patients had an infection at the operation site. Two patients had peritonitis (one metronidazole-netilmicin and one metronidazole-placebo) and three had a wound abscess in the abdominal wall (all metronidazole-placebo). It is concluded that a short course of peroperative systemic prophylaxis with metronidazole and netilmicin or cefuroxime--without the use of oral non-absorbable antimicrobials--gave acceptable results in the centres studied.