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5. Cooccurrence of Multiple AmpC β-Lactamases in Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis in Tunisia.

Author

Chérif T, Saidani M, Decré D, Boutiba-Ben Boubaker I, and Arlet G

Subjects
Aminoglycosides pharmacology, Anti-Bacterial Agents pharmacology, Bacterial Proteins metabolism, Base Sequence, Drug Resistance, Bacterial genetics, Enterobacteriaceae Infections epidemiology, Enterobacteriaceae Infections microbiology, Escherichia coli drug effects, Escherichia coli enzymology, Escherichia coli isolation & purification, Gene Expression, Humans, Klebsiella pneumoniae drug effects, Klebsiella pneumoniae enzymology, Klebsiella pneumoniae isolation & purification, Microbial Sensitivity Tests, Molecular Sequence Data, Penicillins pharmacology, Plasmids metabolism, Proteus mirabilis drug effects, Proteus mirabilis enzymology, Proteus mirabilis isolation & purification, Tunisia epidemiology, Virulence Factors metabolism, beta-Lactamases metabolism, Bacterial Proteins genetics, Escherichia coli genetics, Klebsiella pneumoniae genetics, Plasmids chemistry, Proteus mirabilis genetics, Virulence Factors genetics, beta-Lactamases genetics
Abstract

Over a period of 40 months, plasmid-mediated AmpC β-lactamases were detected in Tunis, Tunisia, in 78 isolates (0.59%) of Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis. In 67 isolates, only one ampC gene was detected, i.e., blaCMY-2-type (n = 33), blaACC (n = 23), blaDHA (n = 6) or blaEBC (n = 5). Multiple ampC genes were detected in 11 isolates, with the following distribution: blaMOX-2, blaFOX-3, and blaCMY-4/16 (n = 6), blaFOX-3 and blaMOX-2 (n = 3), and blaCMY-4 and blaMOX-2 (n = 2). A great variety of plasmids carrying these genes was found, independently of the species and the bla gene. If the genetic context of blaCMY-2-type is variable, that of blaMOX-2, reported in part previously, is unique and that of blaFOX-3 is unique and new., (Copyright © 2015, American Society for Microbiology. All Rights Reserved.)

Published
2015
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