Change of drug resistance in 420 strains of clinically isolated Enterococcus bacteria / 国际检验医学杂志

ABSTRACT

Objective To study the clinical isolation situation of Enterococcus bacteria and the drug resistance change to provide the basis for guiding clinical rational drug use and controlling infection.Methods The clinical specimens in our hospital from Janu-ary 2008 to June 2013 were performed the routine bacterial culture,identification and drug sensitivity test.The WHONET 5.6 soft-ware was used to analyze the distribution of the clinical Enterococcus bacteria l isolates in various samples and the departments and the drug resistance change during this period.Results Total 420 strains of Enterococcus bacteria were isolated during this period, including 288 strains of E.faecium(68.6%),128 strains of E.faecalis(30.5%),3 strains of E.gallinarum(0.7%)and 1 strain of E.casseliflavus(0.2%).The Enterococcus bacteria isolates were mainly distributed in urine(60.5%),wound secretion(20.0%) and blood(13.6%).The large changes occurred in the strains and drug-resistance of isolated Enterococcus bacteria during this peri-od.The proportion of E.faecium maintained about 65% every year.The proportion of E.faecalis was about 35%.The resistance rate of E.faecium to ampicillin,penicillin and nitrofurantoin was significantly higher than that of E.faecalis .Its resistance rates to penicillin,tetracycline,nitrofurantoin,high concentration gentamycin,high concentration streptomycin,ciprofloxacin and ampicillin were close to or over 70%.Total 3 strains of vancomycin-resistant E.faecium were isolated,including 2 strains in 2008 and 1 strain in 2009.Total 13 strains of vancomycin-intermediate E.faecalis were isolated,including 1 strain in 2008,5 strains in 2009 and 7 strains in 2010.Conclusion The drug resistance of Enterococcus bacteria is very serious and the drug resistance of different strains is different.The clinical anti-infection should rationally select the antibacterial drugs for increasing the curative effects according to the in vitro susceptibility of the isolated strains to the bacterial drugs.