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- W1570252771 abstract "Objective: Combination therapy is recommended for carbapenem resistant Gram negative bacilli (CR GNB) infections. However, limited data exists on the clinical effectiveness of antibiotic combinations. The purpose of this study was to evaluate the efficacy of colistin-carbapenem combination against CR GNB infection in a clinical study and an in vitro synergy study using Etest. Methods: A study was conducted in a tertiary care hospital to evaluate the clinical outcome of patients with CR GNB infections who were treated with colistin-carbapenemcombination between January to April, 2013. It was comprised of 33 patients with CR GNB infection. Detection of in vitro synergy was performed by Etest for colistin-meropenem combination on five isolates. These isolates were also screened for the resistant genes bla OXA-23 , bla VIM and bla NDM using single target PCR. Results: 33 CR GNB included Acinetobacter spp. (19), Pseudomonas aeruginosa (7) and Enterobacteriaceae spp. (7). Overall clinical success of 60.6% was observed in patients receiving colistin-carbapenem combination therapy. In respiratory infection, the clinical success rate was only 25%, whereas in soft tissue infection it was 57.1%. In bloodstream infection 100% clinical success was observed. All five isolates screened using PCR was carrying bla NDM gene, whereas isolate of Acinetobacter baumannii also carried bla OXA-23 and bla VIM gene. Indifferent interactions were observed between colistin and meropenem against all five isolates. Conclusion: We observed low clinical success rate for colistin-carbapenem combination therapy, probably due to indifferent interactions between colistin and meropenem against NDM producing strain. In addition, probable pharmacokinetic concern of colistin may have a role to play. Keywords: Carbapenem resistance, Etest, New Delhi metallo-β-lactamases, Synergy." @default.
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- W1570252771 date "2014-10-01" @default.
- W1570252771 modified "2023-09-26" @default.
- W1570252771 title "COLISTIN-CARBAPENEM COMBINATION THERAPY AGAINST CARBAPENEM RESISTANT GRAM NEGATIVE BACILLI INFECTIONS: CLINICAL AND AN IN VITRO SYNERGY STUDY" @default.
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