Microbiologic and clinical implications of bacteremia due to extended-spectrum-β-lactamase-producing Klebsiella pneumoniae with or without plasmid-mediated AmpC β-lactamase DHA-1

Chen Hsiang Lee, Lin Hui Su, Chia Chin Li, Chun Chih Chien, Ya Fen Tang, Jien Wei Liu*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

24 Scopus citations

Abstract

Bacteremias caused by Klebsiella pneumoniae producing extended-spectrum beta-lactamase (ESBL-KP; n = 52) and producing both ESBL and AmpC-type DHA-1 beta-lactamase (ESBL-PMABL-KP; n = 20) were analyzed. Higher MIC50s and MIC90s for carbapenems, ciprofloxacin, and piperacillin- tazobactam were observed with ESBL-PMABL-KP than with ESBL-KP. Patients with oxyimino-β-lactam exposure and high modified Pitt bacteremia scores (HMPBSs) were at higher risk, while those with piperacillin-tazobactam and aminoglycoside exposure were at lower risk for ESBL-KP bacteremia. Patients with fluoroquinolone exposure, diabetes mellitus, and HMPBS were at higher risk, while those with aminoglycoside exposure were at lower risk, for ESBL-PMABL-KP bacteremia.

Original languageEnglish
Pages (from-to)5395-5398
Number of pages4
JournalAntimicrobial Agents and Chemotherapy
Volume54
Issue number12
DOIs
StatePublished - 12 2010

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