Genomic characterization of multidrug-resistant ESBL-producing Klebsiella pneumoniae isolated from a Ghanaian teaching hospital.

Autor: Agyepong N; Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa. Electronic address: agyanicho33@yahoo.com., Govinden U; Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa., Owusu-Ofori A; School of Medical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana., Amoako DG; Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa; Infection Genomics and Applied Bioinformatics Division, Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa., Allam M; Sequencing Core Facility, National Institute for Communicable Disease, National Health Laboratory Service, South Africa., Janice J; Norwegian National Advisory Unit on Detection of Antimicrobial Resistance, Department of Microbiology and Infection Control, University Hospital of North Norway, Tromso, Norway., Pedersen T; Norwegian National Advisory Unit on Detection of Antimicrobial Resistance, Department of Microbiology and Infection Control, University Hospital of North Norway, Tromso, Norway., Sundsfjord A; Norwegian National Advisory Unit on Detection of Antimicrobial Resistance, Department of Microbiology and Infection Control, University Hospital of North Norway, Tromso, Norway; Department of Medical Biology, Faculty of Health Sciences, UiT - The Arctic University of Norway, Norway., Essack S; Antimicrobial Research Unit, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa.
Jazyk: angličtina
Zdroj: International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases [Int J Infect Dis] 2019 Aug; Vol. 85, pp. 117-123. Date of Electronic Publication: 2019 May 23.
DOI: 10.1016/j.ijid.2019.05.025
Abstrakt: Objectives: This study delineated the clonal lineages, antibiotic resistome and plasmid replicon types in multidrug-resistant K. pneumoniae isolates from a teaching hospital in Ghana.
Methods: Identification and antibiotic susceptibility testing were done using the MALDI-TOF MS and Vitek-2 automated system. Genomic DNA extraction was carried out using the NucliSens easyMAG® (BioMérieux) kits and the DNA was subjected to whole genome sequencing (WGS) using the Illumina MiSeq platform.
Results: Of the 200 isolates obtained, 37 were identified as K. pneumoniae of which 9 were resistant to all second and third-generation cephalosporins. These 9 isolates selected for further genomic analysis were characterized by the presence of 8 diverse sequence types (STs), capsular polysaccharide serotypes (K types and wzi allelic types) and multiple genes encoding resistance to β-lactams (bla CTX-M-15 , bla SHV-11, bla TEM-1B, bla OXA-1 ), aminoglycosides (aac(3)-IIa, strB, strA, aadA16), fluoroquinolones/quinolones (qnrB66, oqxA, oqxB) and other antibiotic classes. Resistance genes were associated with plasmids, predominantly IncFIB(K) and ColRNAI. Multiple and diverse mutations in quinolone resistance-determining regions of gyrA (S83Y, D87A) and parC (S80I, N304S) in isolates resistant to ciprofloxacin (MIC ≥ 4 mg/mL) were found. Global phylogenomic analysis affirmed the diverse clonal clustering and origin of these isolates.
Conclusions: The varied clonal clusters and resistome identified in the multidrug-resistant K. pneumoniae isolates is a major threat to the management of infections in Ghana. The molecular characterization of antibiotic resistance is thus imperative to inform strategies for containment.
(Copyright © 2019 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE