Novel variants of the qnrB gene, qnrB31 and qnrB32, in Klebsiella pneumoniae
نویسندگان
چکیده
منابع مشابه
Characteristics of Klebsiella pneumoniae harboring QnrB32, Aac(6')-Ib-cr, GyrA and CTX-M-22 genes.
Quinolone resistance in members of the Enterobacteriaceae family is mostly due to mutations in the quinolone resistance-determining regions of topoisomerase genes. CTX-M-22 is a member of the CTX-M family which can reduce extended-spectrum β-lactamase (ESBL) production and modulate antibiotic resistance, resulting in low ceftazidime minimum inhibitory concentrations (MICs). There are four diffe...
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Resistance to quinolones in Gram-negative bacteria is usually mediated by the following: (i) chromosomal mutations that alter the target enzymes, DNA gyrase and topoisomerase IV, in their quinolone resistance-determining regions (QRDR), (ii) changes in drug entry (loss of porin channels), and (iii) the presence of plasmid-mediated quinolone resistance (PMQR) determinants [qnrA, qnrB, qnrS, qnrC...
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background : klebsiella pneumoniae is among the most common and significant agents of community and hospital-acquired infections. plasmid mediated quinolone resistance (pmqr) was increasingly identified in enterobacteriaceae family worldwide. plasmid-mediated quinolone resistance (pmqr) was first reported in 1998 from a klebsiella pneumoniae isolate in the usa. till date, five qnr proteins h...
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ژورنال
عنوان ژورنال: Journal of Medical Microbiology
سال: 2011
ISSN: 0022-2615,1473-5644
DOI: 10.1099/jmm.0.034272-0