Distribution and change of antimicrobial resistance of common pathogenic bacteria from geriatric ward / 中国感染控制杂志

ABSTRACT

Objective To analyze the distribution and change of antimicrobial resistance of common pathogenic bacteria from geriatric ward,and provide reference for rational use of antimicrobial agents.Methods Specimens from hospitalized patients in a geriatric ward from 2009 to 2013 were analyzed,the isolated pathogenic bacteria and antimicrobial resistance of bacteria were analyzed statistically.Results From 2009 to 2013,a total of 7 426 patho-genic bacteria were isolated,the percentage of gram-negative bacilli,gram-positive cocci,and fungi were 90.96%(n=6 755),7.23%(n =537),and 1 .81 % (n = 134),respectively.The top 5 detected bacteria were Pseudomonas aeruginosa (39.16%),Escherichia coli (16.47%),Stenotrophomonas maltophilia (10.65%),Klebsiella pneu-moniae (7.22%),and Acinetobacter baumannii (6.21 %),these strains were mainly isolated from sputum (94.15%,n =5 573 ).Resistance rates of Acinetobacter baumannii to all detected antimicrobial agents,Pseudo-monas aeruginosa to 8 kinds of common antimicrobial agents (piperacillin / tazobactam,ceftazidime,aztreonam, imipenem,et al),Escherichia coli to 5 kinds of common antimicrobial agents (piperacillin/ tazobactam,cefopera-zone/sulbactam,aztreonam,levofloxacin,and ciprofloxacin),and Stenotrophomonas maltophilia to ceftazidime and levofloxacin all showed an increased tendency (all P 0.05).Conclusion The major pathogenic bacteria isolated from geriatric ward is Pseudomonas aeruginosa ,which is highly resistant to multiple antimicrobial agents, antimicrobial agents should be chosen based on antimicrobial susceptibility testing results.