Genetic analysis of a high-level vancomycin-resistant isolate of Staphylococcus aureus

被引:658
作者
Weigel, LM [1 ]
Clewell, DB
Gill, SR
Clark, NC
McDougal, LK
Flannagan, SE
Kolonay, JF
Shetty, J
Killgore, GE
Tenover, FC
机构
[1] Ctr Dis Control & Prevent, Div Healthcare Qual Promot, Atlanta, GA 30333 USA
[2] Univ Michigan, Sch Dent, Dept Biol & Mat Sci, Ann Arbor, MI 48109 USA
[3] Inst Genom Res, Rockville, MD 20850 USA
[4] J Craig Center Sci Fdn Joint Technol Ctr, Rockville, MD 20850 USA
关键词
D O I
10.1126/science.1090956
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Vancomycin is usually reserved for treatment of serious infections, including those caused by multidrug-resistant Staphylococcus aureus. A clinical isolate of S. aureus with high-level resistance to vancomycin ( minimal inhibitory concentration = 1024 mug/ml) was isolated in June 2002. This isolate harbored a 57.9-kilobase multiresistance conjugative plasmid within which Tn1546 (vanA) was integrated. Additional elements on the plasmid encoded resistance to trimethoprim (dfrA), beta-lactams (blaZ), aminoglycosides (aacA-aphD), and disinfectants ( qacC). Genetic analyses suggest that the long-anticipated transfer of vancomycin resistance to a methicillin-resistant S. aureus occurred in vivo by interspecies transfer of Tn1546 from a co-isolate of Enterococcus faecalis.
引用
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页码:1569 / 1571
页数:3
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