Pelvic infections represent the most feared complications associated with vaginal and abdominal hysterectomy. In the present paper we show result of a prospective randomized clinical trial carried out to study different morbidities (F.M. febrile morbidity, U.T.I. urinary tract infections, P.C. pelvic cellulitis, P.A. pelvic abscess, W.I. wound infection) in a sample of 155 patients undergoing vaginal or abdominal hysterectomy for non malignant disease, divided into three groups. group C, treated with 2 g cefoxitin i.v. in the preoperative period; group C+T, the same treatment with the addition of T tube suction drainage; group T, with only the T tube suction drainage. A statistical analysis of the sample showed the homogeneity of each group, while the study of the morbidities showed a statistical significant difference for W.I. between the groups treated with antibiotic and the T group (p less than .001). For all the other morbidities, no statistically significant differences were found between the groups, demonstrating that all three methods are considerably efficient in reducing postoperative morbidity in hysterectomy.