| Literature DB >> 30323045 |
Laurent Poirel1,2,3, José-Manuel Ortiz De La Rosa4,2, Nicolas Kieffer4,3, Véronique Dubois5,6, Aurélie Jayol4,2,3,7, Patrice Nordmann4,2,3,8.
Abstract
A clinical Pseudomonas aeruginosa isolate resistant to all β-lactams, including ceftolozane-tazobactam and carbapenems, was recovered. It belonged to sequence type 235 and produced the extended-spectrum β-lactamase (ESBL) GES-6 differing from GES-1 by two amino acid substitutions (E104K and G170S). GES-6 possessed an increased hydrolytic activity toward carbapenems and to ceftolozane and a decreased susceptibility to β-lactamase inhibitors compared to GES-1, except for avibactam. We show here that resistance to ceftolozane-tazobactam may occur through acquisition of a specific ESBL in P. aeruginosa but that ceftazidime-avibactam combination remains an effective alternative.Entities:
Keywords: ESBL; GES-6; Pseudomonas aeruginosa; ceftolozane-tazobactam
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Year: 2018 PMID: 30323045 PMCID: PMC6325188 DOI: 10.1128/AAC.01809-18
Source DB: PubMed Journal: Antimicrob Agents Chemother ISSN: 0066-4804 Impact factor: 5.191