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Piperacillin and tazobactam versus clindamycin and gentamicin in the treatment of hospitalized women with pelvic infection. The Piperacillin/tazobactam Study Group.

Author(s): Sweet RL, Roy S, Faro S, O'Brien WF, Sanfilippo JS, Seidlin M

Affiliation(s): University of California, San Francisco.

Publication date & source: 1994-02, Obstet Gynecol., 83(2):280-6.

Publication type: Clinical Trial; Multicenter Study; Randomized Controlled Trial

OBJECTIVE: To compare the efficacy and safety of a combination of piperacillin and tazobactam with that of clindamycin and gentamicin in the treatment of hospitalized women with infections of the upper genital tract. METHODS: This was a randomized open-label trial in hospitalized women with infections of the upper genital tract. Patients were recruited at 12 hospitals in the United States and two hospitals in Canada and were randomly assigned to one of two regimens in a 2:1 ratio. One group received piperacillin, 3 g every 6 hours, and tazobactam, 375 mg every 6 hours; the other group received clindamycin, 900 mg every 8 hours, and gentamicin, 2.5-5.0 mg/kg/day in three divided doses. Therapy with the assigned regimen was to be administered for a minimum of 3 days. Cultures for aerobic and anaerobic bacteria were obtained from the site of infection before initiation of therapy. Cultures for Chlamydia trachomatis were also obtained from patients with endometritis or pelvic inflammatory disease. Subjects were evaluated for clinical and bacteriologic response at 24-72 hours and 2-4 weeks after completing therapy. RESULTS: Two hundred ninety-nine patients were enrolled; 196 were in the piperacillin-tazobactam group and 103 were in the clindamycin-gentamicin group. The most common diagnoses were endometritis (146) and pelvic inflammatory disease (115). The most common microorganisms recovered included: Peptostreptococcus sp (99), Prevotella sp (87), black pigmented Bacteroides (29), B fragilis (11), enterococci (64), group B streptococcus (26), Escherichia coli (31), Neisseria gonorrhoeae (49), and C trachomatis (19). A favorable clinical response occurred in 84.7% (166 of 196) of piperacillin-tazobactam patients and 87.3% (90 of 103) of clindamycin-gentamicin patients. Among those evaluable for bacteriologic response, 78% (67 of 86) and 82% (23 of 28), respectively, had a favorable response. Diarrhea occurred significantly more frequently in the piperacillin-tazobactam group (9.7 versus 2.9%; P = .04), but the majority of episodes were mild to moderate. None of the adverse experiences in either treatment group were considered life-threatening and drug-related. CONCLUSION: The combination of piperacillin and tazobactam is an effective and well-tolerated antibiotic regimen for the treatment of infections of the upper genital tract in women.

Page last updated: 2006-01-31

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