Antibiotic prophylaxis of respiratory tract infection in mechanically ventilated patients. A prospective, blinded, randomized trial of the effect of a novel regimen. Influence of combined intravenous and topical antibiotic prophylaxis on the incidence of infections, organ dysfunctions, and mortality in critically ill surgical patients: a prospective, stratified, randomized, double-blind, placebo-controlled clinical trial. Failure of topically applied antibiotics, added to systemic prophylaxis, to reduce perineal wound infection in abdominoperineal excision of the rectum. Prevention of colonization and respiratory infections in long-term ventilated patients by local antimicrobial prophylaxis. Prophylactic antibiotics in vascular surgery. Topical, systemic, or both? Prevention of ventilator-associated pneumonia by oral decontamination: a prospective, randomized, double-blind, placebo-controlled study. Antibiotics in elective colon surgery. A randomized trial of oral, systemic, and oral/systemic antibiotics for prophylaxis. Single-dose v. short-term antibiotic therapy for prevention of wound infection in general surgery. A prospective, randomized double-blind trial. Use of surfactant for prophylaxis versus rescue treatment of respiratory distress syndrome: experience from an Italian-Bulgarian trial. A controlled trial in intensive care units of selective decontamination of the digestive tract with nonabsorbable antibiotics. The French Study Group on Selective Decontamination of the Digestive Tract. An evaluation of statewide strategies to reduce antibiotic overuse. A double-blind randomized controlled trial on the use of prophylactic antibiotics in patients undergoing elective caesarean section. Oral versus systemic antibiotic prophylaxis in elective colon surgery: a randomized study and meta-analysis send a message from the 1990s. Use of a polyvalent bacterial lysate in patients with recurrent respiratory tract infections: results of a prospective, placebo-controlled, randomized, double-blind study. Prospective, randomised study on antibiotic prophylaxis in colorectal surgery. Is it really necessary to use oral antibiotics? Randomized trial of prophylactic antibiotic therapy after preterm amnion rupture. Decrease in nosocomial pneumonia in ventilated patients by selective oropharyngeal decontamination (SOD). A community intervention trial to promote judicious antibiotic use and reduce penicillin-resistant Streptococcus pneumoniae carriage in children. Oral prophylaxis with neomycin and erythromycin in colorectal surgery. More proof for efficacy than failure. [Antibiotic prophylaxis in a priori cesarean sections without a high risk of infection. Experiences of a Tunisian maternity department]. Does prophylactic administration of systemic antibiotics prevent postoperative inflammatory complications after third molar surgery? Antibiotic prophylaxis in percutaneous endoscopic gastrostomy (PEG)--results from a prospective randomized multicenter trial. Oral is superior to systemic antibiotic prophylaxis in operations upon the colon and rectum. Short-course empiric antibiotic therapy for patients with pulmonary infiltrates in the intensive care unit. A proposed solution for indiscriminate antibiotic prescription. Prophylactic antibiotics in the insertion of Tenckhoff catheters. Comparison of two prophylactic single-dose intravenous antibiotic regimes in the treatment of patients undergoing elective colorectal surgery in a district general hospital.
The objective of this study was to assess the effect of a novel regimen of antibiotic prophylaxis on the incidence of lower respiratory tract infection in patients requiring prolonged (at least five days) mechanical ventilation. The design was a controlled, prospective, randomized trial, with blinded comparison of the groups regarding the incidence of respiratory tract infection in an intensive care unit of a university hospital. After determination of the APACHE II score for severity of disease, 88 patients were randomly divided in three groups. Twenty-four of these patients did not complete five days of mechanical ventilation, and eight were withdrawn for other reasons. Fifty-six patients (18 in group 1, 21 in group 2, 17 in group 3) completed the study. Patients in both control groups 1 and 2 did not receive antibiotic prophylaxis, but the two groups differed in the antibiotic policy in case of infection. Patients in group 3 received antibiotic prophylaxis consisting of norfloxacin, polymyxin E, and amphotericin B, applied topically in oropharynx and stomach from time of ICU admission until extubation, and intravenous cefotaxime 500 mg three times a day during the first five days of admission. In both control groups, about 90 percent of the patients acquired microbial colonization of oropharynx or stomach. In group 3, only 12 percent and 24 percent of the patients acquired colonization of oropharynx and stomach, respectively (p less than 0.001). This resulted in a reduction of the incidence of lower respiratory tract infection (78 percent in group 1, 62 percent in group 2, 6 percent in group 3 [p = 0.0001]). The regimen of antibiotic prophylaxis studied prevented respiratory tract infection in mechanically ventilated patients. Antibiotic prophylaxis should be considered in all patients expected to require prolonged mechanical ventilation. We prospectively studied the impact of an antibiotic prophylaxis regimen on the incidence of infections, organ dysfunctions, and mortality in a predominantly surgical and trauma intensive care unit (ICU) population. A total of 546 patients were enrolled and stratified according to Acute Physiology and Chronic Health Evaluation (APACHE)-II scores. They were then randomized to receive either 2 x 400 mg of intravenous ciprofloxacin for 4 days, together with a mixture of topical gentamicin and polymyxin applied to the nostrils, mouth, and stomach throughout their ICU stay or to receive intravenous and topical placebo. When receiving prophylaxis, significantly fewer patients acquired infections (p = 0.001, risk ratio [RR], 0.477; 95% confidence interval [CI], 0.367-0.620), especially pneumonias (6 versus 29, p = 0.007), other lower respiratory tract infections (39 versus 70, p = 0.007), bloodstream infections (14 versus 36, p = 0.007), or urinary tract infections (36 versus 60, p = 0.042). Also, significantly fewer patients acquired severe organ dysfunctions (63 versus 96 patients, p = 0.0051; RR, 0.636; 95% CI, 0.463-0.874), especially renal dysfunctions (17 versus 38; p = 0.018). Within 5 days after admission, 24 patients died in each group, whereas 28 patients receiving prophylaxis and 51 receiving placebo died in the ICU thereafter (p = 0.0589; RR, 0.640; 95% CI, 0.402-1.017). The overall ICU mortality was not statistically different (52 versus 75 fatalities), but the mortality was significantly reduced for 237 patients of the midrange stratum with APACHE-II scores of 20-29 on admission (20 versus 38 fatalities, p = 0.0147; RR, 0.508; 95% CI, 0.295-0.875); there was still a favorable trend after 1 year (51 versus 60 fatalities; p = 0.0844; RR, 0.720; 95% CI, 0.496-1.046). Surveillance cultures from tracheobronchial, oropharyngeal, and gastric secretions and from rectal swabs did not show any evidence for the selection of resistant microorganisms in the patients receiving prophylaxis. In a prospective, randomized trial, prophylactic use of topical antibiotics in addition to systemic prophylaxis was studied in patients undergoing abdominoperineal amputation of the rectum. All patients received gentamicin 80 mg and metronidazole 500 mg intravenously at induction of anesthesia, followed by the same dose 8 hourly for 48 hours. In accordance with the randomization, half of the patients were additionally given gentamicin 160 mg + metronidazole 400 mg topically into the perineal wound at closure. Perineal wound infection appeared in 19 of the 41 patients who received both systemic and topical prophylaxis, and in 18 of the 38 with only systemic antibiotics. Cell-mediated immunity was preoperatively assessed with a skin test (Multitest) in all but three patients. Impairment of cell-mediated immunity was associated with significantly heightened rate of wound infection, and these patients did not benefit from topical antibiotics. In a randomized clinical trial the prophylactic effects of locally administered antimicrobials on quantitative colonization and respiratory infections were studied in intubated patients with an expected period of mechanical ventilation of greater than 6 days. Nineteen patients received 50 mg of polymyxin B and 80 mg of gentamicin distributed among nose, oropharynx and stomach at 6-h intervals, as well as 300 mg of amphotericin B in the oropharynx. Twenty untreated patients served as controls. In the control group colonization by respiratory pathogens was more common (oropharynx 19 vs 6 patients (p less than 0.001); trachea 19 vs 11 (p less than 0.01)), and the number as well as the count of the colonizing species was usually higher. Fourteen patients of the control group developed respiratory infections, including nine cases of pneumonia, as compared to four patients with prophylaxis, including one case of pneumonia (p less than 0.01). Pneumonia-associated deaths were prevented with prophylaxis; however, the overall mortality remained unchanged. Respiratory infections in the prophylaxis group were associated with organisms resistant to the agents used, but the overall occurrence of resistance was not increased, as compared to the control group. We conclude that unrestrained upper airway colonization by respiratory pathogens and respiratory tract infection were causally related. Local antimicrobial prophylaxis proved to be a highly effective strategy for the prevention of potentially life-threatening pneumonias in critically ill patients, but in the present study the host setting appeared to be the major determinant of outcome. A prospective, randomized, blinded study was performed to determine whether prophylactic antibiotics would reduce the incidence of infection in peripheral vascular surgery and whether the route of antibiotic administration was important. Patients undergoing a vascular procedure with a groin incision were allocated to one of four groups with respect to prophylactic antibiotics. Group I received no antibiotic. Group II had topical cephradine instilled in their incisions prior to closure. Group III received a 24-hour perioperative course of intravenous cephradine, and Group IV received both topical and intravenous cephradine. Groin and abdominal incisional infections were significantly reduced (p < 0.01) among patients who received prophylactic antibiotics by either the topical, systemic, or combined routes of administration. No significant differences were noted among the three antibiotic groups. Profundoplasty, femoral embolectomy, and femoral aneurysm repair were each associated with an increased incidence of infection (p < 0.01). Other risk factors were only important in patients not receiving antibiotics. Either intraoperative topical antibiotics or perioperative systemic antibiotics prevent infection in peripheral vascular surgery, but antibiotic administration by both routes is unnecessary. Colonization of the intestinal tract has been assumed to be important in the pathogenesis of ventilator-associated pneumonia (VAP), but relative impacts of oropharyngeal, gastric, or intestinal colonization have not been elucidated. Our aim was to prevent VAP by modulation of oropharyngeal colonization, without influencing gastric and intestinal colonization and without systemic prophylaxis. In a prospective, randomized, placebo-controlled, double-blind study, 87 patients received topical antimicrobial prophylaxis (gentamicin/ colistin/vancomycin 2% in Orabase, every 6 h) in the oropharynx and 139 patients, divided over two control groups, received placebo (78 patients were studied in the presence of patients receiving topical prophylaxis [control group A] and 61 patients were studied in an intensive care unit where no topical prophylaxis was used [control group B]). Baseline characteristics were comparable in all three groups. Topical prophylaxis eradicated colonization present on admission in oropharynx (75% in study group versus 0% in control group A [p < 0.00001] and 9% in control group B patients [p < 0.00001]) and in trachea (52% versus 22% in A [p = 0.03] and 7% in B [p = 0.004]). Moreover, topical prophylaxis prevented acquired oropharyngeal colonization (10% versus 59% in A [p < 0.00001] and 63% in B [p < 0.00001]). Colonization rates in stomach and intestine were not affected. Incidences of VAP were 10% in study patients, 31% in Group A, and 23% in Group B patients (p = 0.001 and p = 0.04, respectively). This was not associated with shorter durations of ventilation or ICU stay or better survival. Oropharyngeal colonization is of paramount importance in the pathogenesis of VAP, and a targeted approach to prevent colonization at this site is a very effective method of infection prevention. Keywords: cross infection, prevention and control; respiration, artificial, adverse effects; antibiotics, administration and dosage infection control methods; pneumonia, etiology, prevention and control; intubation, intratracheal, adverse effects A prospective, randomized double-blind study was undertaken to compare the efficacy of three prophylactic regimens (oral neomycin and erythromycin, intravenous cefoxitin, and a combination of both oral and intravenous antibiotics) in patients undergoing elective colorectal surgery. One hundred sixty-nine patients were randomized and 146 patients were evaluable. Septic complications occurred in 11.4 per cent of patients receiving oral antibiotics only, in 11.7 per cent of patients receiving intravenous cefoxitin alone, and in 7.8 per cent of patients receiving both oral and intravenous antibiotics. These differences were not statistically different. The greatest number of septic complications occurred in those patients with anastomotic disruptions. Two patients died (1.3%), both of whom had major anastomotic failures. There was no advantage between any of the groups in the incidence of wound infection (3.9-6.8%). Thus, no advantage could be identified in this study in the combination of oral and intravenous antibiotics in elective colorectal surgery. To investigate the effectiveness of a single-dose antibiotic regimen for preventing postoperative wound infection, a prospective, randomized double-blind trial was carried out in patients undergoing "clean-contaminated", "contaminated" or "clean" (vascular) surgery. Both elective and emergency operations were included. Single-dose (preoperative) prophylaxis was compared with short-term prophylaxis (1 dose preoperatively and 2 doses postoperatively). The antibiotics were penicillin, tobramycin and metronidazole in various combinations, and comparisons between single-dose and short-term prophylaxis were made with all the regimens. The incidence of wound infection was 5/277 (1.8%) in the short-term group and 9/287 (3.1%) in the single-dose group. The difference was not statistically significant. Nor was statistically significant difference found when the type of operation and the degree of contamination were considered. Single-dose antibiotic prophylaxis thus gave a low incidence of postoperative wound infection, even in "clean-contaminated" or "contaminated" cases. To show if surfactant applied in different social-sanitary realities as prophylaxis of respiratory distress syndrome (RDS) is equally useful and able to reduce mortality and incidence of 3-4 radiological grade RDS.
                Two neonatal intensive care units (NICU) in Italy, one NICU in Bulgaria and one NICU in Romania were involved in a randomized controlled clinical trial of prophylaxis vs rescue treatment of RDS. Babies with gestational age 26-30 wks were randomized before birth to prophylaxis in the delivery-room with 200 mg/kg of porcine surfactant (prophylaxis) or to routine assistance (control). Subsequently the babies developing RDS requiring mechanical ventilation and fraction of inspired oxygen (FiO2) > or = 0.4 to maintain PaO2 about 50 mmHg were allowed to be treated rescue with 200 mg/kg of the same surfactant. To reach end-points of reducing mortality by 40% and incidence of radiological grade 3-4 RDS a total number of 174 patients were required.
                Due to logistic, practical and social-political problems the study was interrupted after enrollment of 93 babies (61 in Italy and 32 in Bulgaria). The Romanian centre did not start the study because it was impossible in the scheduled times to equip it for mechanical ventilation of the newborn infants. Analysis done on an intention to treat basis did not show significant reductions of mortality and 3-4 radiological grade RDS, even if there was a trend towards a reduction in the babies given prophylaxis. A significantly lower number of babies given prophylaxis required a subsequent rescue treatment compared to controls (p < 0.001). There was no difference in other complications such as intraventricular haemorrhage, air-leak syndromes and infections between prophylaxis and control infants. As regards pulmonary gas exchange, the PaO2/FiO2 ratio was significantly improved in the babies given prophylaxis for the first 12 hours of life vs the controls.
                Even if the study was terminated before term, the analysis of the data shows that prophylaxis with surfactant is equally effective in different social-clinical conditions to improve pulmonary gas-exchange, especially in the first critical hours of life of premature babies. Selective decontamination of the digestive tract with topical nonabsorbable antibiotics has been reported to prevent nosocomial infections in patients receiving mechanical ventilation, and the procedure is used widely in Europe. However, it is unclear whether selective decontamination improves survival.
                We conducted a randomized, double-blind multicenter study in which 445 patients receiving mechanical ventilation in 15 intensive care units were given either prophylactic nonabsorbable antibiotics (n = 220) or a placebo (n = 225). Topical antibiotics (tobramycin, colistin sulfate, and amphotericin B) or a placebo was administered through a nasogastric tube and applied to the oropharynx throughout the period of ventilation. The main end points were the mortality rate in the intensive care unit and within 60 days of randomization.
                A total of 142 patients died in the intensive care unit; 75 (34 percent) in the treatment group and 67 (30 percent) in the placebo group (P = 0.37). Mortality within 60 days of randomization was similar in the two groups (P = 0.40), even after adjustment for factors that were either unbalanced or individually predictive of survival in the two groups (P = 0.70). Pneumonia developed in 59 patients (13 percent) in the intensive care unit within 30 days of enrollment in the study (33 in the placebo group and 26 in the treatment group, P = 0.42). Pneumonia acquired in the intensive care unit and due to gram-negative bacilli was less frequent (P = 0.01) in the treatment group than in the placebo group. The total charges for antibiotics were 2.2 times higher in the treatment group.
                Selective decontamination of the digestive tract does not improve survival among patients receiving mechanical ventilation in the intensive care unit, although it substantially increases the cost of their care. The rapid increase of antibiotic resistance poses a significant threat to human health. Overuse of antibiotics has been linked to rates of antibiotic resistance. This study assessed the utility of two common interventions--1) practice profiling and feedback and 2) patient education materials--implemented to decrease antibiotic prescribing for pediatric upper respiratory infections (URIs).
                Based on Medicaid regions in Kentucky, primary care physicians managing pediatric respiratory infections in Medicaid were randomized into four groups. Groups received either 1) performance feedback only, 2) patient education materials only, 3) both feedback and education materials, or 4) no intervention. Participating physicians had their antibiotic prescribing assessed for the period of July 1, 1996, to November 30, 1997, with an intervention in June 1997. The study included 216 physicians and 124,092 episodes of care.
                All groups increased in proportion of episodes with antibiotics between the pre-intervention and post-intervention periods. Prescribing in the patient education group and the patient education and feedback group increased at a significantly lower rate than in the control group. Physicians did not change their coding of illness to justify antibiotics after the intervention, and there was no significant generalization of effect of the pediatric intervention on prescribing for adult URIs.
                These interventions demonstrate little if any impact on promoting appropriate antibiotic prescribing. Antibiotic prescribing for viral respiratory infections continues to increase, suggesting concomitant increases in antibiotic resistance. In a double-blind randomized controlled study 232 patients undergoing elective lower segment caesarean section were randomly allocated to receive a pre-operative prophylactic dose of a combination of crystalline penicillin and chloramphenicol or a placebo. The two groups were comparable in terms of patient characteristics and operation variables. The group receiving antibiotics had significantly fewer febrile and infectious morbid events and thus spent fewer days in hospital than the group receiving the placebo. To compare the efficacy of combined oral and systemic antibiotics (combined) versus systemic antibiotics (systemic) alone in preventing surgical site infection in elective surgery of the colon, and to perform a meta-analysis of randomized studies comparing combined versus systemic antibiotics in elective colon surgery.
                A double-blind, placebo-controlled, randomized clinical trial.
                The Queen Elizabeth Hospital, Montreal, a university-affiliated community hospital.
                Two hundred and fifteen patients scheduled to undergo elective surgery of the colon.
                Patients were randomized to receive neomycin and metronidazole orally (109 patients) or identical placebos (106 patients) on the final preoperative day. All were given amikacin and metronidazole intravenously just before operation. Thirteen randomized series comparing combined and systemic antibiotic prophylaxis in elective colon surgery were identified for meta-analysis.
                Rates of postoperative surgical site infections: risk differences, risk ratios (RRs) and 95% confidence intervals (CIs); organisms found in the colon and wound fat at surgery, and in infected wounds.
                Three patients in the systemic group, and 5 in the combined group were excluded. Wound infections occurred in 5 patients in the combined group but in 17 in the systemic group (p < 0.01, RR = 0.29, 95% CI 0.11-0.75). Bacteria isolated from wound infections and wound fat were similar to those found in the colon. They were more frequent in the colon in the systemic group (p < 0.001) and occurred in wound fat in the systemic group twice as often as in the combined group (p < 0.001). By stepwise logistic regression, the presence of bacteria in wound fat at surgery was the strongest predictor of postoperative wound infection (p < 0.002). In the meta-analysis, the summary weighted risk difference in surgical site infections between groups (d(w)) and the summary RR both favoured combined prophylaxis (d(w) = 0.56, 95% CI 0.26-0.86; RR = 0.51, 95% CI 0.24-0.78; p < 0.001).
                In elective surgery of the colon combined oral and systemic antibiotics are superior to systemic antibiotics in preventing surgical site infections. Orally administered antibiotics add value by reducing bacterial loading of the colon and wound fat contamination, both associated with postoperative wound infection. Meta-analysis of randomized clinical trials reported from 1975 to 1995 supports these conclusions. Respiratory tract infections (RTIs) are the most common infections in humans, and it is difficult to effectively treat patients with increased susceptibility to these ailments. LW 50020 (Luivac; Paspat oral), an oral immunomodulator consisting of the antigens of seven bacteria commonly involved in RTIs, has been developed for the induction of specific and nonspecific immune responses of the mucosa-associated lymphoid tissue. In this placebo-controlled study, the efficacy and safety of the tablet formulation of LW 50020 were evaluated in children and adults with recurrent RTIs. Tablets were taken once daily during two periods of 4 weeks each, interrupted by a treatment-free interval of 4 weeks. The main endpoint of the study, a clinical severity score that evaluated treatment benefits, was significantly lower in the second study period in patients treated with the bacterial lysate compared to patients given placebo. A comparison of the infection rates in the first and second study periods of patients treated with LW 50020 revealed a placebo-corrected reduction of 39% in children and a placebo-corrected reduction of 44% in adolescents and adults. The placebo-corrected duration of infections was shortened by 47% in children and by 55% in older patients. No serious drug-related side effects occurred. This study demonstrated that the oral bacterial immunomodulator LW 50020 is efficacious in treating patients with recurrent RTIs. The use of prophylactic antibiotics in addition to mechanical cleansing is the current standard of care prior to colonic surgery. The question of whether the antibiotics should be administered intravenously or orally, or by both routes, remains controversial. Our aim was to compare three methods of prophylactic antibiotic administration in elective colorectal surgery.
                Three hundred consecutive elective colorectal resections were studied. All patients had preoperative mechanical colon cleansing with oral sodium phosphate and intravenous antibiotic prophylaxis with cefoxitin (one dose before skin incision and two postoperative doses). Patients were randomised to one of the following three groups: group A: three doses of oral antibiotic (neomycin and metronidazole) at the time of mechanical colon cleansing; group B: one dose of oral antibiotic; group C: no oral antibiotics. All patients were followed during their hospital stay and at 7, 14 and 30 days post-surgery.
                Vomiting occurred in 31%, 11% and 9% of the studied patients (groups A, B and C, respectively) (p<0.001). Nausea was present in 44%, 18% and 13% of patients (p<0.001). Abdominal pain was recorded in 13%, 10% and 4% of patients (p: 0.077). Wound infection was present in 7%, 8% and 6% and suture dehiscence occurred in 2%, 2% and 3% of the patients in the three groups (no differences among them). Neither were differences found among the three groups in terms of urinary infections, pneumonia, postoperative ileus or intra-abdominal abscess.
                The addition of three doses of oral antibiotics to intravenous antibiotic prophylaxis is associated with lower patient tolerance in terms of increased nausea, vomiting and abdominal pain, and has shown no advantages in the prevention of postoperative septic complications. Therefore, we recommend that oral antibiotics should not be used prior to colorectal surgery. Our purpose was to determine whether maternal administration of prophylactic ampicillin or erythromycin after preterm amnion rupture is associated with maternal or neonatal benefits.
                Women with singleton pregnancies between 24 and 33 weeks 6 days of gestation were eligible if they had no immediate indication for delivery. After giving informed consent, patients were randomized either to receive ampicillin (erythromycin if penicillin allergic) until delivery or to enter a control group. Women whose cervical cultures were positive for either group B streptococci or Neisseria gonorrhoeae received treatment. Tocolytics and corticosteroids were not used.
                From January 1990 to February 1992 117 patients (antibiotics 59, control 58) were recruited and analyzed. Prophylactic antibiotics were associated with a longer latent phase (mean 12 vs 7.0 days, p = 0.004) and fewer maternal infectious complications (29% vs 60%, p = 0.001). A higher incidence of neonatal necrotizing enterocolitis was observed in the treatment group (14% vs 3.5%, p = 0.05). Other neonatal complications, including death, were lower in the treatment group, but none attained statistical significance (p = 0.09 to 0.33).
                The use of prophylactic antibiotics in selected patients after preterm amnion rupture appears to have a demonstrable maternal benefit. Large, multicenter trials may demonstrate a significant neonatal benefit or confirm any adverse outcomes. To determine the influence of selective oropharyngeal decontamination (SOD) on the rate of colonization and infection of the respiratory tract in intensive care patients requiring mechanical ventilation for more than 4 days. A financial assessment was also performed.
                Randomized, prospective, controlled study using amphotericin B, colistin sulfate (polymyxin E), and tobramycin applied to the oropharynx and systemic cefotaxime prophylaxis.
                Anesthesiology intensive care unit (ICU) of a 1500-bed hospital.
                A total of 88 patients admitted as emergencies and intubated within less than 24 h were enrolled. Fifty-eight patients received SOD and 30 patients served as controls. Randomization was in the proportion of 2 : 1 study patients to controls.
                Microbiological samples from the oropharynx and other infected sites were taken at the time of admission, then twice a week and after extubation.
                With the use of SOD, colonization was significantly reduced. Furthermore, the infection rate decreased from 77% in the controls to 22% in the study patients. Staphylococcus aureus was the main potential pathogen causing colonization and pneumonia. Number of days in the ICU, duration of ventilation, and mortality were not significantly decreased. The total cost of antibiotics was reduced. Development of resistance was not observed.
                The use of SOD significantly reduced the colonization and pneumonia and the total charge for antibiotics. The length of stay in the ICU, duration of ventilation, and mortality were similar. No resistance was observed. Staphylococcus aureus was selected by SOD in some patients and the clinical relevance needs further observation. Inappropriate use of antibiotics is common in primary care, and effective interventions are needed to promote judicious antibiotic use and reduce antibiotic resistance. The objective of this study was to assess the impact of parent and clinician education on pediatric antibiotic prescribing and carriage of penicillin-nonsusceptible Streptococcus pneumoniae in child care facilities.
                A nonrandomized, controlled, community intervention trial was conducted in northern Wisconsin Clinicians. Clinic staff received educational materials and small-group presentations; materials were distributed to parents through clinics, child care facilities, and community organizations. Prescribing data were analyzed for 151 clinicians who provided primary pediatric care; nasopharyngeal carriage of penicillin-nonsusceptible S pneumoniae was assessed for 664 children in the baseline period (January-June 1997) and for 472 children in the postintervention period (January-June 1998).
                The median number of solid antibiotic prescriptions per clinician declined 19% in the intervention region and 8% in the control region. The median number of liquid antibiotic prescriptions per clinician declined 11% in the intervention region, compared with an increase of 12% in the control region. Retail antibiotic sales declined in the intervention region but not in the control region. Among participating children in child care facilities, there were no significant differences in antibiotic use or penicillin-nonsusceptible S pneumoniae colonization between the intervention and control regions.
                A multifaceted educational program for clinicians and parents led to community-wide reductions in antibiotic prescribing, but in child care facilities, there was no apparent impact on judicious antibiotic use or colonization with drug-resistant S pneumoniae. Longer follow-up time or greater reductions in antibiotic use may be required to identify changes in the pneumococcal susceptibility. In an open, prospective, and randomized investigation on the prophylactic efficacy of peroral neomycin sulfate-erythromycin base vs intravenous ceftriaxone-metronidazole preparation in colorectal surgery, no significantly diverging results between regimens were recorded (1/27 [3.7%] and 2/27 [7.4%] wound infections, respectively). Commentary is made about the diverging results from earlier studies on antimicrobial prophylaxis and on the multifactorial causality of surgical infection. We believe that variables such as physical condition of the patients, virulence and local resistance patterns of bacteria, and technical skill of the surgeons are far more important in regard to the postoperative outcome concerning septic complications than is the choice of proper antibiotics. Thus, to determine the efficacy of antimicrobial prophylaxis, we call for larger investigations in the future, preferably double-blind, where it is possible to better control and diminish the influence of determinants other than the antibiotics being compared. This study was conducted to evaluate the effect of antibiotic prophylaxy on decreasing the frequency of postoperative infections after cesarean sections performed in cases with no prior indication of a high risk of infection.
                A prospective randomized study included 269 cesarean sections without a high risk of infection performed in the Maternity and Neonatology Ward of the Sousse Hospital from February 1991 to July 1991. The patients were randomly divided into two groups. One group received an antibiotic prophylactic treatment including cephapirine, gentamicin and metronidazole) and the second group was given no treatment.
                Antibiotic prophylactic therapy led to a reduction of infectious morbidity after cesarean section in patients without high risk o infection from 33% to 11%. A 66% rate of efficacy was observed. In addition, antibiotics given in this context led to substantial cost reduction both by reducing the cost of antibiotics prescribed in the postoperative period and by reducing the number of days of hospitalization, and thus total cost.
                This study demonstrated the effectiveness of antibiotic prophylaxy for cesarean sections in patients without a high risk of infection. Nevertheless, a reevaluation of the antibiotic protocols and a rigorous operative procedure are essential. To estimate and compare the frequencies of inflammatory complications after third molar (M3) surgery in subjects receiving intravenous prophylactic antibiotics or saline placebo.
                Using a placebo-controlled, double-blind, randomized clinical trial, the investigators enrolled a sample composed of subjects who required extraction of at least 1 impacted M3 and requested intravenous sedation or general anesthesia. The predictor variable was treatment group classified as active treatment (penicillin or clindamycin for penicillin-allergic subjects) or placebo (0.9% saline). Study medications were randomly assigned. Both surgeon and subject were blinded to treatment assignment. The medication was administered intravenously prior to any incision. The outcome variable was postoperative inflammatory complication classified as present or absent and included alveolar osteitis (AO) or surgical site infection (SSI). Other variables were demographic, anatomic, or operative. Descriptive and bivariate statistics were computed. Statistical significance was set at P < or = .05, single-tailed test of hypothesis.
                The sample was composed of 118 subjects (n = 59 per study group). In the active treatment group, there were no postoperative inflammatory complications. In the placebo group, 5 subjects (8.5%) were diagnosed with SSI, (P = .03). No subject met the case definition for AO. All SSIs were associated with the removal of partial bony or full bony impacted mandibular M3s.
                In the setting of third molar removal, these results suggest that the use of intravenous antibiotics administered prophylactically decrease the frequency of SSIs. The authors cannot comment on the efficacy of intravenous antibiotics in comparison to other antibacterial treatment regimens, eg chlorhexidine mouthrinse or intrasocket antibiotics. To determine the efficacy of antibiotic prophylaxis in percutaneous endoscopic gastrostomy (PEG) as a part of a standardized regimen.
                An open prospective randomised multicenter study in 216 patients. 106 received ceftriaxone 1 g i.v. 30 min preinterventionally and 110 no study medication. A standardized protocol was followed for PEG preparation, insertion, and aftercare; all patients received a 15 French gastrostomy tube. Follow-up of local and systemic infection and clinical course was continued to postintervention day 10. An aggregate erythema and exudation score > 3 or the presence of pus was taken as indicative of peristomal infection. The pharmacoeconomics of antibiotic use were also examined.
                In no-prophylaxis patients, wound infection rates were 23.6% on day 4 and 24.5% on day 10 vs. 7.6% (p < 0.05) and 11.4% (p < 0.05), respectively, in prophylaxis patients. Results were disproportionally better in tumor patients in comparison with neurological patients. Patients systemic infection rates were 11.8% vs. 1.9% in noprophylaxis vs. prophylaxis (p < 0.05), and overall infection rates 36.3% vs. 13.3%, respectively (p < 0.05). Pneumonia was more frequent in patients with underlying neurological disease and reduced in the prophylaxis group. Antibiotic and application costs were similar in both groups (p = 0.400).
                Single-dose ceftriaxone 1 g is a effective prophylaxis against local and systemic infection after PEG and should be a part of a standard regimen. The prophylactic effect of a short preoperative loading dose of oral neomycin and erythromycin upon infectious complications following elective operations upon the colon and rectum was compared with the prophylactic effect of systemic administration of metronidazole and gentamicin preoperatively and postoperatively. In this randomized prospective clinical study, 45 patients received neomycin-erythromycin while 48 received metronidazole-gentamicin; all patients were prepared mechanically using whole gut irrigation with a mannitol solution. Both groups were comparable in sex, age, clinical diagnosis and type of operation performed. In the neomycin-erythromycin group, 41 of 45 patients had an uncomplicated postoperative course versus 35 of 48 patients in the other group (p less than 0.001) and fewer wound infections (p less than 0.05). We conclude that the better results observed with the neomycin-erythromycin combination is probably an addition of two effects--the decrease in colon flora and the adequate serum levels of antibiotics during the operation. Inappropriate antibiotic use for pulmonary infiltrates is common in the intensive care unit (ICU). We sought to devise an approach that would minimize unnecessary antibiotic use, recognizing that a gold standard for the diagnosis of nosocomial pneumonia does not exist. In a randomized trial, clinical pulmonary infection score (CPIS) (Pugin, J., R. Auckenthaler, N. Mili, J. P. Janssens, R. D. Lew, and P. M. Suter. Diagnosis of ventilator-associated pneumonia by bacteriologic analysis of bronchoscopic and nonbronchoscopic "blind" bronchoalveolar lavage fluid. Am. Rev. Respir. Dis. 1991;143: 1121-1129) was used as operational criteria for decision-making regarding antibiotic therapy. Patients with CPIS </= 6 (implying low likelihood of pneumonia) were randomized to receive either standard therapy (choice and duration of antibiotics at the discretion of physicians) or ciprofloxacin monotherapy with reevaluation at 3 d; ciprofloxacin was discontinued if CPIS remained </= 6 at 3 d. Antibiotics were continued beyond 3 d in 90% (38 of 42) of the patients in the standard as therapy compared with 28% (11 of 39) in the experimental therapy group (p = 0.0001). In patients in whom CPIS remained </= 6 at the 3 d evaluation point, antibiotics were still continued in 96% (24 of 25) in the standard therapy group but in 0% (0 of 25) of the patients in the experimental therapy group (p = 0.0001). Mortality and length of ICU stay did not differ despite a shorter duration (p = 0.0001) and lower cost (p = 0.003) of antimicrobial therapy in the experimental as compared with the standard therapy arm. Antimicrobial resistance, or superinfections, or both, developed in 15% (5 of 37) of the patients in the experimental versus 35% (14 of 37) of the patients in the standard therapy group (p = 0.017). Thus, overtreatment with antibiotics is widely prevalent, but unnecessary in most patients with pulmonary infiltrates in the ICU. The operational criteria used, regardless of the precise definition of pneumonia, accurately identified patients with pulmonary infiltrates for whom monotherapy with a short course of antibiotics was appropriate. Such an approach led to significantly lower antimicrobial therapy costs, antimicrobial resistance, and superinfections without adversely affecting the length of stay or mortality. We assessed the efficacy of preoperative antibiotic prophylaxis in a prospective trial for patients undergoing insertion of Tenckhoff catheters for continuous ambulatory peritoneal dialysis (CAPD). The prophylactic regimen was a single dose of cefazolin (500 mg) and gentamicin (80 mg) given intravenously half an hour before surgery. There was no significant difference in the number of exit site infections (8 in the antibiotic group vs. 8 in the controls) and the number of episodes of peritonitis (5 in the antibiotic group vs. 2 in the controls). Our study showed that prophylactic preoperative antibiotics did not reduce the number of exit site infections and peritonitis after the insertion of Tenckhoff catheters. Two hundred and twenty-nine patients were entered into a study to compare the effectiveness and safety of two single-shot antibiotic regimes in patients undergoing elective colorectal surgery in two district general hospitals. A single shot of intravenous (IV) latamoxef disodium was as effective as an IV combination of cefuroxime and metronidazole in control of wound infection following elective large bowel surgery when given as a bolus at the time of anaesthetic induction. The incidence of major wound infection was 6% and was evenly distributed in the two treatment groups. Half the major wound infections were associated with faecal fistulae. A single shot of IV antibiotic at the time of anaesthetic induction was safe, simple and an effective prophylaxis against major wound infection. There was a low incidence (1.3%) of serious postoperative bleeding and no serious adverse reactions were noted. The overall mortality was 9%. Death was significantly related to elderly patients, a poor performance status, operative contamination and wound infections.
A combination of topical and systemic prophylactic antibiotics reduces RTIs and overall mortality in adult patients receiving intensive care. Treatment based on the use of topical prophylaxis alone reduces respiratory infections but not mortality. The risk of resistance occurring as a negative consequence of antibiotic use was appropriately explored only in one trial which did not show any such effect.