Distribution and drug resistance of major pathogens for urinary tract infections / 中华临床感染病杂志

ABSTRACT

Objective To investigate the distribution and drug resistance of major pathogens for urinary tract infections in the First Affiliated Hospital of Nanjing Medical University.Methods Strains from midstream urine culture of patients with urinary tract infections were collected during January 1 and December 31,2011.All strains were identified by API system,and disk diffusion method was used for drug sensitivity test.Results Totally 1129 strains were isolated,in which 667 (59.1％ ) were Gram-negative strains,266 (23.5％) were Gram-positive strains,and 196 (17.4) were Candida.Among Gram-negative strains,Escherichia coli,Klebsiella pneumoniae and Proteus mirabilis were highly sensitive to carbapenem antibiotics; while Acinetobacter baumannii and Pseudomonas aeruginosa were highly resistant to most antibiotics including cephalosporins and penicillinase inhibitor,and the resistance rates were over 50％.Among Gram-positive strains,the major strains Enterococcus avium and Enterococcusfaecalis were completely sensitive to vancomycin and teicoplanin,and highly sensitive to linezolid (resistance rate below 10％ ).Candida albicans and Candida glabrata were highly resistant to voriconazole and fluconazole (with the resistance rates of 47.2％ - 60.0％ ), but were completely sensitive to amphotericin and nystatin.Conclusion Gram-negative strains account for most urinary tract infections in the First Affiliated Hospital of Nanjing Medical University with high drug resistance rates.