期刊
EUROPEAN JOURNAL OF CLINICAL MICROBIOLOGY & INFECTIOUS DISEASES
卷 29, 期 1, 页码 25-30出版社
SPRINGER
DOI: 10.1007/s10096-009-0810-9
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From May 2007 to January 2008, 30 isolates of vancomycin-resistant enterococci (VRE), including 29 Enterococcus faecium (96.7%) and 1 E. faecalis (3.3%) were obtained from various clinical specimens of 30 patients treated at a university hospital in Taiwan. Among these patients, 27 had VRE infections, including urinary tract infection (n = 16), bacteremia (n = 5), wound infection (n = 5), and central nervous system infection (n = 1). Three patients had VRE colonization. All of these isolates belonged to the vanA genotype with vancomycin minimum inhibitory concentrations of 64a parts per thousand yen128 mu g/ml. The isolate of E. faecalis had VanB phenotype-vanA genotype. All these isolates were susceptible to linezolid and were inhibited by tigecycline at 0.25 mu g/ml. Multilocus sequence typing (MLST) analysis of the E. faecium isolates showed that 82.8% were ST78, which belongs to lineage C1. Transposon typing classified the 30 isolates of VRE into three types and most of the Tn1546-like elements contained an IS1251-like insertion sequence. Mating experiments showed that the vanA gene clusters were transferable at a frequency of about 10(-6) to 10(-7). Our findings indicate that nosocomial spread of VRE resulted from dissemination of lineage C1 E. faecium clones, including a novel E. faecium MLST type (ST444), and the horizontal transfer of Tn1546 elements among enterococci.
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