| Literature DB >> 28242667 |
Ryan K Shields1,2, M Hong Nguyen3,2, Ellen G Press1, Liang Chen4, Barry N Kreiswirth4, Cornelius J Clancy1,2,5.
Abstract
Ceftazidime-avibactam resistance is mediated by blaKPC-3 mutations, which restore carbapenem susceptibility. We subjected Klebsiella pneumoniae isolates with different blaKPC-3 mutations (n = 5) or wild-type blaKPC-3 (n = 2) to serial passages with meropenem. The meropenem MIC against each isolate increased. Mutations in the ompK36 porin gene evolved in 5 isolates. Among isolates with D179Y substitutions in KPC-3, blaKPC-3 mutations reverted to wild type, were replaced by new mutations, or were retained. Carbapenem treatment of ceftazidime-avibactam-resistant K. pneumoniae infections may select for carbapenem resistance.Entities:
Keywords: KPC mutations; Klebsiella pneumoniae carbapenemase; carbapenem-resistant Enterobacteriaceae; ceftazidime-avibactam resistance; sequence type 258 Klebsiella pneumoniae
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Year: 2017 PMID: 28242667 PMCID: PMC5404588 DOI: 10.1128/AAC.00079-17
Source DB: PubMed Journal: Antimicrob Agents Chemother ISSN: 0066-4804 Impact factor: 5.191