Antimicrobial resistance monitoring of bacteria isolated from blood culture in Xinjiang area during 2013 / 重庆医学

ABSTRACT

Objective To understand the distribution characteristics and drug resistance of bacteria isolated from blood cul‐ture in Xinjiang area during 2013 .Methods The identification of isolated bacteria were performed by adopting the France VITEK‐Compact and the ABI series bacterial identification instruments .The antimicrobial susceptibility test was carried out by using the minimum inhibitory concentration (MIC) and Kirby‐Bauer (K‐B) methods .Results A total of 3 962 strains of bacteria were isola‐ted from clinical blood culture ,in which Gram‐positive bacteria and Gram‐negative bacteria accounted for 50 .8% and 49 .2% respec‐tively .The most frequent strains were coagulase‐negative staphylococci (31 .7% ) ,Escherichia coli (23 .2% ) ,Staphylococcus aureus (9 .5% ) ,Klebsiella pneumoniae (8 .7% ) ,Acinetobacter baumannii (3 .6% ) ,Enterobacter cloacae (2 .5% ) ,Enterococcus faecium (2 .5% ) ,Pseudomonas aeruginosa (2 .2% ) ,Enterococcus faecalis (2 .0% ) and Streptococcus pneumoniae (1 .1% ) .The detection rate of extended‐spectrum beta‐lactamase (ESBLs) producing Escherichia coli ,Klebsiella pneumoniae and Proteus mirabilis were 69 .8% ,62 .6% and 66 .7% respectively .The detection rates of methicillin‐resistant Staphylococcus aureus(MRSA) and methicillin‐resistant coagulase‐negative Staphylococcus (MRCNS) was 36 .2% and 86 .3% respectively .The pan‐drug resistant (XDR) strains of Acinetobacter baumannii ,Pseudomonas aeruginosa ,Klebsiella pneumonia were 14 strains(9 .9% ) ,1(1 .2% ) ,2 strains(0 .1% ) ,16 strains(0 .6% ) .No strains resistant to vancomycin or linezolid were found in Staphylococcus and Enterococcus faecalis .Conclusion Among blood culture isolated bacteria in Xinjiang area ,the proportion of Gram‐positive bacteria and Gram‐negative bacteria have little difference .The diversity of bacterial species exist .The resistance to commonly used antibiotics is serious .The distribution situ‐ation of blood culture isolated bacteria should be timely understood .The bacterial drug resistance monitoring should be strengthened to control the nosocomial infections ,guide rational drug use in clinic and control the generation and spread of drug resistant bacterial strains .