Distribution and antibiotic resistance of pathogens isolated from inpatients with urinary tract infections / 中华临床感染病杂志

ABSTRACT

Objective To investigate the distribution and antibiotic resistance of pathogens isolated from inpatients with urinary tract infections.Methods A retrospective analysis was carried out on 1033 strains of pathogens isolated from urine culture in patients with urinary tract infections in Zhejiang Xiaoshan Hospital during January 2009 and December 2011.Urine specimens were cultured with Uricult,and K-B method was used for drug susceptibility test,WHONET 5.6 software was used to analyse drug susceptibility test.Results Among 1033 strains of pathogens,681 (65.9％) were gram-negative bacteria,197 (19.1％) were gram-positive bacteria,and 155 (15.0％) were fungi.The three most prevalent bacteria were Escherichia coli (402 strains,38.9％),Klebsiella pneumoniae (74 strains,7.2％) and Candida albicans (64 strains,6.2％).60.7％ (244/402) of Escherichia coli and 45.9％ (34/74) of Klebsiella pneumoniae were extended-spectrum β-lactamases (ESBLs) positive.Escherichia coli and Klebsiella pneumoniae were susceptible to imipenem,meropenem,cefoperazone/sulbactam,piperacillin/tazobactam and amikacin.Enterococcus and staphylococcus were susceptible to vancomycin,linezolid and furadantin.Candida was sensitive to flucytosine,voriconazole and amphotericin B.Conclusion Gram-negative bacteria mainly E.coli is the predominant pathogen to urinary tract infections in this group of patients.Regular analysis and monitoring of pathogen species and drug resistance is important for rational use of antibiotics.