Comparative assessment of five clinical Klebsiella isolates in terms of antibiotic resistance and plasmid profiles / Beş farklı klinik Klebsiella türünün antibiyotik dirençliliği ile plazmid profillerinin karşılaştırmalı olarak değerlendirilmesi

Abstract

Abstract Objective: This study is firstly aimed to biotype and to investigate the antibiotic resistance profiles of Klebsiella strains which were isolated from clinical materials. Also plasmid profile types of Klebsiella species were investigated and the results were compared with each other. Methods: Klebsiella strains were biotyped by BBL Enterotube II and the antibiotic resistance was tested by Kirby Bauer disc diffusion method. In order to analyse Klebsiella strains genotypically, plasmid DNA’s of them were isolated and generated plasmid profile types determined by Dice coefficients of similarity. Results: According to biotyping, Klebsiella strains were distributed to five different species (K. pneumoniae, K. ornithinolytica, K. oxytoca, K. terrigena, K. rhinoscleromatis). As well as K. pneumoniae (37.33%) was the most isolated strain, K. terrigena (8.95%) which is not found to be investigated as much as other strains in the literature, was also observed. Additionally, it is determined that Klebsiella strains were resistant to at least one and at most seven antibiotics. With a similarity coefficient of 84%, it was observed that five different Klebsiella species displayed 17 different plasmid profile types. Among these profiles, P1 (52.23%) was the most observed type which exhibits >10 kbp plasmid DNA band and this profile was isolated from all strains. Conclusion: Finally, it is observed that antibiotic resistance can be due to the plasmid or chromosomal sources and different strains of the same genus may exhibit the same plasmid profile because of the plasmid transformation from one strain to another.