Abstract
Aims: The objective of this study was phenotypic and genotypic characterization of antibacterial-resistant Klebsiella pneumoniae clinical strains isolated in Moscow Transplantology Intensive Care Unit in 2017-2019. Results: Major strains among K. pneumoniae (n = 63) isolated from 30 patients were recognized as extensive drug-resistant (n = 55) pathogens, and remaining strains were recognized as multidrug-resistant (n = 8) pathogens. The beta-lactamase genes blaSHV-1,-2a,-11,-27,-67,-187 (n = 63), blaCTX-M-14,-15 (n = 61), blaTEM-1 (n = 54), blaOXA-48 (n = 52), and blaNDM-1 (n = 2), as well as class 1 integrons (n = 19) carried gene cassette arrays aacA4 (n = 2), dfrA1-orfC (n = 6), aadB-aadA1 (n = 9), dfrA15-aadA1 (n = 3), and dfrA12-orfF-aadA2 (n = 1) were identified in the strains. All strains carried four virulence genes: wabG, fimH, uge, and allS, but two strains had additionally kfu gene. Six known sequence types (STs) of K. pneumoniae ST395 (n = 44), ST377 (n = 3), ST307 (n = 4), ST13 (n = 2), ST39 (n = 2), ST3346 (n = 1), and a novel sequence-type ST3551 (n = 7) were identified. Phylogenetic analysis showed that ST3551 belonged to the cluster of clonal group CG147, and the remaining six STs to the another cluster consist...Continue Reading
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