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- W4283215741 abstract "This study reported the identification of a novel ceftazidime-avibactam-resistant KPC-2 variant, KPC-123, in a Citrobacter koseri isolated from a patient in a Chinese hospital following ceftazidime-avibactam treatment of infection caused by OXA-232-producing Klebsiella pneumoniae. This novel KPC-123 consisting of 302 amino acids differs from KPC-2 by two insertions after positions 179 (ins179_TY) and 270 (ins270_DDKHSEA), respectively. Conjugation and cloning experiments confirmed that KPC-123 was able to confer high-level resistance to ceftazidime and ceftazidime/avibactam (MICs of 128 mg/L and 64/4 mg/L, respectively) and elevated MIC values of cefotaxime, cefepime, and aztreonam (4 mg/L, 2 mg/L, and 4 mg/L, respectively) but retained susceptibility to carbapenems. Whole-genome sequencing and genomic analysis revealed that blaKPC-123 within the ISKpn27-blaKPC-ISKpn6 structure was located on a 93,814-bp conjugative plasmid that was almost identical to a blaKPC-2-carrying plasmid harbored in a K. pneumoniae isolate from the same sampling site of the patient, suggesting the transfer and in vivo evolution of this blaKPC-carrying plasmid. Hence, active surveillance of ceftazidime/avibactam resistance and the underlying mechanisms, which may facilitate the prevention and control of the dissemination of resistance, is needed." @default.
- W4283215741 created "2022-06-22" @default.
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- W4283215741 date "2022-06-20" @default.
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- W4283215741 title "Identification of a Novel Ceftazidime-Avibactam-Resistant KPC-2 Variant, KPC-123, in Citrobacter koseri Following Ceftazidime-Avibactam Treatment" @default.
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- W4283215741 doi "https://doi.org/10.3389/fmicb.2022.930777" @default.
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