RESUMO
Objective To research the resistant characteristics, genotype and prevalence of vancomycin-resistant Enterococci( VRE) . Methods K-B disc diffusion method was used to determine the susceptibility, minimum inhibi-tory concentration ( MIC) for vancomycin of VRE was detected by E-test method;VRE was then subjected to PCR for resistance related genes;6 strains sequencing results of PCR product were contrastively analyzed the amino acid sequence by BLAST. Results 6 VREFm strains were found from 193 strains enterococci;6 VREFm strains were completely resistant to high unit gentamicin, ampicillin, ciprofloxacin, teicoplanin,but were sensitive to linezolid and macrodantin,MIC for vancomycin was more than 256 mg/L;Genotypes were vanA;Amino acids in vanA gene have changed with Asn83→Asp( AAC→GAC) . Conclusion VRE in our hospital is mostly multi-drug resistant , which bringS difficulty in clinical treatment for its infection. So the hospital should strengthen the prevention and monitoring, to prevent the spread of VRE strains in the hospital and popular.
RESUMO
Objective To determine the risk factors of nosocomial infections caused by Enterococcus,and to develop effective protective measures.Methods A retrospective study was conducted among 193 patients who had been infected by Enterococcus from Jan.2011 to Dec.2011 in the First Affiliated Hospital of Anhui Medical University.Clinical data were collected and related risk factors for enterococcal infection were screened.Results The risk factors for enterococcal infection included biliary tract surgery (OR=1.264,95％CI:1.141-1.401,P =0.000),drainage tube intubation (OR=1.619,95％CI:0.301-4.190,P=0.010),urinary tract intubation (OR=2.001,95％CI:1.739-3.803,P 0.000),uses of third generation cephalosporin (OR=2.085,95％CI:1.181-3.682,P=0.011) andcarbapenems (OR=1.473,95％CI:1.060-2.023,P =0.024).Furthermore,biliary tract surgery (OR=4.861,95％CI:3.029-7.802,P=0.000) and urinary tract intubation (OR=2.737,95％CI:1.764-4.246,P=0.002) were risk factors for both Enterococcus faecalis and Enterococcus faecium infection,while drainage tube intubation (CR =1.861,95％CI:1.702 1.911,P=0.038),uses of the third generation cephalosporin (OR=1.122,95％CI:1.022-1.224,P=0.016) and carbapenems (OR=3.051,95％CI:1.185-7.855,P=0.021) were independent risk factors for Enterococcus faecium infection.Conclusions Surveillance