[Parenteral antibiotic prophylaxis or oral antimicrobial bowel preparation for colorectal surgery (author's transl)]. Randomized clinical trial of antibiotic therapy for antenatal pyelonephritis. Effectiveness of antibiotic prophylaxis in preventing bacteriuria after multichannel urodynamic investigations: a blind, randomized study in 124 female patients. Selective suppression of alimentary tract microbial flora as prophylaxis during granulocytopenia. Efficacy of oral antibiotics following parenteral antibiotics for serious infections in obstetrics and gynecology. Oral vs intravenous ciprofloxacin in the initial empirical management of severe pyelonephritis or complicated urinary tract infections: a prospective randomized clinical trial. Single dose antibiotic therapy is not as effective as conventional regimens for management of acute urinary tract infections in children. Optimal duration of antibiotic therapy for uncomplicated urinary tract infection in older women: a double-blind randomized controlled trial. Suppression and treatment of urinary tract infection in patients with an intermittently catheterized neurogenic bladder.
A prospective randomized trial was designed to establish whether parenteral antibiotic prophylaxis was as effective as oral antimicrobial bowel preparation in preventing sepsis after colorectal surgery. Patients scheduled for elective resection of colorectal cancer received metronidazole and kanamycin either orally in the preoperative phase or parenterally as a short-term perioperative prophylaxis. The former regimen resulted in reduction of the microbial concentrations in the bowel contents in the absence of therapeutic serum concentrations at the time of operation, whereas the latter achieved therapeutic intraoperative serum levels without altering the colonic microflora. 72 patients were studied. There was no significant difference in the occurrence of postoperative sepsis between the two groups (a total of 72 patients). These results differ from those obtained at the Birmingham General Hospital using the same protocol, in which postoperative sepsis was significantly more common in the group of patients having oral bowel preparation. This difference was most probably due to an overgrowth of kanamycin-resistant coliforms during the period of oral antibiotic preparation. The presence of resistant organisms did not, however, result in failure of systemic prophylaxis. The authors conclude that short-term parenteral application is the safer method of antibiotic prophylaxis in colorectal surgery and is to be preferred to oral antimicrobial bowel preparation. The aim of this study was to prospectively evaluate the efficacy of a therapeutic course of intravenous antibiotics followed by oral antibiotics vs. intravenous antibiotics alone to prevent recurrent urinary tract infection.
                Pyelonephritis was documented by strict criteria in 67 pregnant women who were then treated with appropriate intravenous antibiotics until afebrile and asymptomatic for 48 h. Women were then randomized to completion of a 10-day course of oral nitrofurantoin 100 mg qid or no further antibiotic therapy. Urine cultures (UC) were obtained 2 and 6 weeks after discharge, and at delivery. A positive UC or readmission for pyelonephritis was considered endpoints for participation in the study. Antibiotic suppression was not used.
                Readmission for pyelonephritis prior to the 2-week follow-up visit occurred in 2/36 (5.6%) women randomized to the oral therapy group compared to 4/31 (12.9%) in the no oral treatment group (P = 0.29). At the 2-week follow-up visit, 6/31 (19.4%) women had a positive UC in the oral therapy compared to 8/26 (30.1%) in the no oral treatment group but this difference was not statistically significant (P = 0.31).
                Completion of 10 days of antibiotic therapy with oral medication does not significantly reduce the risk of recurrent pyelonephritis immediately post-parenteral treatment. Women in the no oral treatment group had a non-significant increase in positive UC at the 2-week follow-up visit. The high rates of recurrent urinary tract infection during pregnancy in both groups underscore the need for regular UC and for the possible role of oral antibiotic suppression. One hundred twenty-four women with chronic, persistent lower urinary tract symptoms who had been scheduled for elective urodynamic investigations at Mount Sinai's Urodynamic Investigative Unit were divided into two blind, randomized groups, receiving either a placebo or prophylactic antibiotic. At the time of urodynamic testing, the rate of unsuspected urinary tract infection was 8.1%. There was no statistically significant decrease in postinstrumentation infection rate in the group who received prophylactic antibiotics. We conclude that, given in the fashion described in the study, prophylactic antibiotics are not effective in preventing urinary tract infections caused by urodynamic testing. Oral nonabsorbable antibiotics have been used to suppress the rectal flora in granulocytopenic patients. Problems with these therapies, i.e., compliance, acquisition of undesirable flora, and cost, motivated the search for an alternative therapy which would increase compliance and effectively reduce the Enterobacteriaceae without creating a microbiol vacuum. Trimethoprim-sulfamethoxazole was found to be easily taken, to suppress the Enterobacteriaceae, and to maintain the anaerobic rectal flora for biological stability of the rectal ecosystem. However, concurrent use of parenteral antibiotics profoundly influenced rectal flora and temporarily destroyed the colonization resistance afforded by the anaerobes. Patients with serious soft-tissue infections in obstetrics and gynecology are frequently treated with parenteral antibiotics until afebrile and clinically well for 48-72 hours, and then discharged on a broad-spectrum oral antibiotic. To evaluate the efficacy of this type of management, we designed a prospective, randomized single-blinded study comparing a group of patients who received oral antibiotics after hospital discharge (N = 80) with a group who did not (N = 83). No significant differences in age, race, parity, diagnosis, or pathogen isolated were observed between the patients in the two groups. No significant difference was noted in delayed morbidity between those who did and those who did not take oral antibiotics (P greater than .06). In light of the cost of oral antibiotics and the chance of drug-induced side effects, the data suggest that oral antibiotics after parenteral antibiotics are not indicated. There are few data on the efficacy of oral antibiotics in the initial empirical management of severe forms of urinary tract infection (UTI).
                In a multicenter, prospective, randomized trial we compared oral (500 mg twice daily) vs intravenous ciprofloxacin (200 mg twice daily) in the initial empirical management of hospitalized patients with serious forms of UTI. Exclusion criteria were severe sepsis, inability to take oral medication, or the presence of obstruction or renal foci of suppuration. The study population included 66 women with pyelonephritis, 43 patients with community-acquired UTIs, and 32 patients with hospital-acquired UTIs. The frequency of bacteremia was 28 (42%) of 66 in the patients with pyelonephritis and 25 (33%) of 75 in those with complicated UTIs. Seventy-two patients were randomized to treatment with oral and 69 to intravenous ciprofloxacin.
                There were no infection-related deaths and no patients required an early change of antibiotics because of worsening clinical status during the initial empirical phase of treatment. The mean duration of fever was 1.7 days in patients treated by the oral vs 1.9 days in patients treated by the intravenous route (P = .15). The rates of microbiological failure (3% in the oral vs 2% in the intravenous treatment group) and of unsatisfactory clinical response (4% oral vs 3% intravenous) were low. A treatment change was eventually required in 14% of the patients assigned to the oral and 7% of the patients assigned to the intravenous regimen, mainly because of the isolation of enterococci or ciprofloxacin-resistant organisms in pretherapy urine specimens.
                In the hospital setting, oral ciprofloxacin is as effective as the intravenous regimen in the initial empirical management of serious UTIs, including bacteremic forms, in patients without severe sepsis, obstruction, or renal foci of suppuration. The efficacy of the oral regimen indicates a potential use for ciprofloxacin in outpatient treatment of a subset of patients currently hospitalized on account of disease severity. One hundred thirty-two children with acute urinary tract infection were randomly assigned to receive trimethoprim-sulfamethoxazole in one dose, two doses daily for 3 days or two doses daily for 7 days. The patient characteristics, etiologic agents and frequency of roentgenologic abnormalities were similar for the three treatment groups. There was no significant difference in bacteriologic cure rates for the single dose regimen (93%) and multidose regimens (96%). The difference in rates of recurrent urinary tract infection between the single dose (20.5%) and 3-day (5.6%) and 7-day (8%) regimens was statistically significant (P = 0.033). A single dose of trimethoprim-sulfamethoxazole is inadequate treatment for infants and children with acute urinary tract infection. The optimal duration of antibiotic therapy in older patients with uncomplicated urinary tract infection (UTI) is still a matter of debate. The aim of this randomized controlled double-blind noninferiority trial was to compare the efficacy and safety of 3-day and 7-day courses of oral ciprofloxacin for uncomplicated symptomatic UTI in older women.
                A total of 183 women at least 65 years of age with acute uncomplicated UTI were recruited from ambulatory clinics and hospital acute care units. Patients with pyelonephritis, contraindications to fluoroquinolones, recent use of antibiotics, urinary tract abnormalities and diabetes mellitus were excluded. Women were randomly assigned to receive either ciprofloxacin 250 mg twice daily orally for 3 days followed by placebo for 4 days (the 3-day group, 93 patients) or ciprofloxacin 250 mg twice daily orally for 7 days (the 7-day group, 90 patients). Bacterial eradication, clinical improvement and occurrence of adverse events were determined 2 days after completion of treatment, and occurrence of reinfection or relapse were determined 6 weeks after completion of treatment. Bacterial eradication and relapse were determined by urine culture. Double-blind procedures were maintained throughout data collection.
                The proportion of patients with bacterial eradication at 2 days after treatment was 98% (91/93) in the 3-day group and 93% (83/89) in the 7-day group (p = 0.16). The frequency of adverse events, including drowsiness, headache, nausea or vomiting, and loss of appetite, was significantly lower in the 3-day group.
                These results suggest that a 3-day course of antibiotic therapy is not inferior to a 7-day course for treatment of uncomplicated symptomatic UTI in older women, and that the shorter course is better tolerated. We evaluated the optimal means of prevention and treatment of urinary tract infections in 46 patients with an intermittently catheterized neurogenic bladder. Suppression with nightly 160 mg. trimethoprim and 800 mg. sulfamethoxazole compared to placebo showed no difference in the rate of symptomatic or total urinary tract infections. Symptomatic urinary tract infections occurred at the same rate whether routine asymptomatic infections were treated or not. Three-day antibiotic treatment of urinary tract infections showed no decrease in the frequency of symptomatic or total urinary tract infections compared to 10-day therapy. The frequency of post-treatment urinary tract infection persistence, relapse and cure was identical in both groups. Suppressive antibiotics, treatment of asymptomatic urinary tract infections and full course antibiotic therapy offered no advantage over placebo, treatment of symptomatic urinary tract infection only and short course therapy in the management of urinary tract infection in patients with an intermittently catheterized neurogenic bladder.
There is no evidence suggesting that oral antibiotic therapy is less effective for treatment of severe UTI than parenteral or initial parenteral therapy. The results of this review suggest that the mode of application does not determine therapeutic success.