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Expression of Multidrug Efflux Pump Genes acrAB-tolC, mdfA, and norE in Escherichia coli Clinical Isolates as a Function of Fluoroquinolone and Multidrug Resistance
被引:158
|作者:
Swick, Michelle C.
[1
,2
]
Morgan-Linnell, Sonia K.
[1
]
Carlson, Kimberly M.
[1
,3
]
Zechiedrich, Lynn
[1
,2
,3
]
机构:
[1] Baylor Coll Med, Dept Mol Virol & Microbiol, Houston, TX 77030 USA
[2] Baylor Coll Med, Interdept Program Cell & Mol Biol, Houston, TX 77030 USA
[3] Baylor Coll Med, Verna & Marrs McLean Dept Biochem & Mol Biol, Houston, TX 77030 USA
关键词:
16S RIBOSOMAL-RNA;
HYDROPHILIC FLUOROQUINOLONES;
QEPA;
AMINOGLYCOSIDES;
METHYLATION;
BACTERIA;
D O I:
10.1128/AAC.00996-10
中图分类号:
Q93 [微生物学];
学科分类号:
071005 ;
100705 ;
摘要:
In a single quantitative study, we measured acrA, acrB, tolC, mdfA, and norE expression in Escherichia coli clinical isolates by using real-time PCR. acrA and acrB overexpression strongly correlated with fluoroquinolone and multidrug resistance; tolC, mdfA, and norE expression did not. The order of abundance of efflux pump transcripts in all fluoroquinolone-susceptible isolates was tolC (highest), then acrA and acrB, and then mdfA and norE. Our findings suggest acrAB overexpression is an indicator of multidrug resistance.
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页码:921 / 924
页数:4
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