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2015•Antimicrobial Agents and ChemotherapyOpen access

Transfer of CMY-2 Cephalosporinase from Escherichia coli to Virulent Klebsiella pneumoniae Causing a Recurrent Liver Abscess

Yi-Tsung Lin, Yi‐Jiun Pan, Tzu‐Lung Lin, Chang-Phone Fung, Jin-Town Wang

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Abstract

A CMY-2-producing capsular type K2 Klebsiella pneumoniae strain (TVGHKP93) with multidrug resistance was isolated from a recurrent liver abscess in a patient who also carried a CMY-2-producing Escherichia coli strain (TVGHEC01) in the stool. TVGHKP93 retained its high virulence compared with that of the isogenic strain (TVGHKP60) with wild-type resistance from the first liver abscess. Our conjugation experiment showed the successful transfer of the blaCMY-2-carrying plasmid from TVGHEC01 into TVGHKP60. The transconjugant showed both high virulence and the multidrug-resistant phenotype, as did TVGHKP93.

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A CMY-2-producing capsular type K2 Klebsiella pneumoniae strain (TVGHKP93) with multidrug resistance was isolated from a recurrent liver abscess in a patient who also carried a CMY-2-producing Escherichia coli strain (TVGHEC01) in the stool. TVGHKP93 retained its high virulence compared with that of the isogenic strain (TVGHKP60) with wild-type resistance from the first liver abscess. Our conjugation experiment showed the successful transfer of the blaCMY-2-carrying plasmid from TVGHEC01 into TVGHKP60. The transconjugant showed both high virulence and the multidrug-resistant phenotype, as did TVGHKP93.

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Available abstract

A CMY-2-producing capsular type K2 Klebsiella pneumoniae strain (TVGHKP93) with multidrug resistance was isolated from a recurrent liver abscess in a patient who also carried a CMY-2-producing Escherichia coli strain (TVGHEC01) in the stool. TVGHKP93 retained its high virulence compared with that of the isogenic strain (TVGHKP60) with wild-type resistance from the first liver abscess. Our conjugation experiment showed the successful transfer of the blaCMY-2-carrying plasmid from TVGHEC01 into TVGHKP60. The transconjugant showed both high virulence and the multidrug-resistant phenotype, as did TVGHKP93.

Key concepts: Klebsiella pneumoniae, Virulence, Microbiology, Escherichia coli, Plasmid, Enterobacteriaceae, Biology, Multiple drug resistance

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Transfer of CMY-2 Cephalosporinase from Escherichia coli to Virulent Klebsiella pneumoniae Causing a Recurrent Liver Abscess — Research Paper | ScholarLens