Distribution and Drug-resistance Analysis of 2916 Pathogens Strains / 中华医院感染学杂志

ABSTRACT

OBJECTIVE To investigate the distribution of 2916 strains and analyze the antimicrobial susceptibility of major pathogens and to provide evidences for clinical therapy.METHODS The distribution,and the antimicrobial susceptibility of pathogens,which were collected and isolated from all of the clinical specimens from Jan 2007 to Oct 2008 in our hospital,were studied restrospectively.RESULTS Totally 2916 strains(except fungi) of pathogens were isolated from patients,among which 1857 strains were Gram-negative bacteria(63.7%) and 1056 strains were Gram-positive cocci(36.2%).The five common bacteria isolated from the specimens were Escherichia coli(14.3%),Klebsiella pneumoniae(11.8%),Pseudomonas aeruginosa(10.7%),Staphylococcus aureus(10.5%),and Acinetobacter baumanii(8.7%).The ESBLs producing E.coli and K.pneumoniae accounted for 31.4% and 33.7%,respectively;meticillin-resistant S.aureus(MRSA) accounted for 53.3% and meticillin-resistant coagulase-negative staphylococci(MRCNS) accounted for 49.6%;vancomycin-resistant S.aureus was not isolated Gram-negative bacilli had the lowest resistance to carbapenems,and then to piperacillin/tazobactam(TZP) and cefoperazone/sulbactam(CFS),showing multi-resistantce.Gram-positive cocci were more sensitive to vancomycin,rifampicin,nitrofurantoin than to other antibacterials.CONCLUSIONS The drug resistance of the isolated bacteria is common.It is very important to monitor the drug resistance of the bacteria regularly,for guiding the clinic use of antibiotics rationally,and infection control.