Development of Tigecycline Resistance in Carbapenemase-Producing Klebsiella pneumoniae Sequence Type 147 via AcrAB Overproduction Mediated by Replacement of the ramA Promoter

Abstract excerpt

BACKGROUND: 2297, isolated from a patient treated with tigecycline for pneumonia, developed tigecycline resistance, in contrast to carbapenem-resistant isolate 1215, which was collected four months prior to the 2297 isolate. Mechanisms underlying tigecycline resistance were elucidated for the clinical isolates. METHODS: were determined by reverse-transcription quantitative PCR. RESULTS: gene promoter replacement...

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