Quinolone Resistance in Biofilm-Forming Klebsiella pneumoniae-Related Catheter-Associated Urinary Tract Infections: A Neglected Problem

Author:

Dadashi Firouzjaei Mahdi,Hendizadeh Peyman,Halaji Mehrdad,Yaghoubi Sajad,Teimourian Mohammad,Hosseini Akramossadat,Rajabnia Mehdi,Pournajaf AbazarORCID

Abstract

Background: Klebsiella pneumoniae is a bacterium that commonly causes urinary tract infections (UTIs) in hospital settings. The widespread and improper usage of quinolones has increased the resistance rates against these broad-spectrum antibiotics. Objectives: This study aimed to examine the connection between the ability to form biofilms and fluoroquinolone resistance in K. pneumoniae isolated from catheter-associated UTIs. Methods: A total of 110 nonduplicative K. pneumoniae-related catheter-associated UTIs were isolated from three large educational hospitals in Babol, north of Iran. The minimal inhibitory concentration (MIC) of ciprofloxacin was calculated for each detected isolate using the agar dilution procedure. Biofilm production was investigated by a 96-well flat-bottom microtiter plate. The prevalence of gyrA, parC, qnrA, qnrS, acc (6’)-Ib-cr, qepA, qnrB, oqxA, and oqxB genes was evaluated using polymerase chain reaction (PCR). Results: Overall, 28.2% of the strains were resistant to imipenem and considered carbapenem-resistant K. pneumoniae (CRKp). Ciprofloxacin resistance was observed in 66.4%. Moreover, 70% of the isolates produced biofilm. Biofilm production was significantly higher in ciprofloxacin-resistant compared to ciprofloxacin-susceptible strains (P-value < 0.05). Molecular distribution of resistance genes in the 68-fluoroquinolone resistance-Kp strains showed that the prevalence of gyrA, parC, qnrA, qnrS, acc (6’)-Ib-cr, qepA,, qnrB, oqxA, and oqxB genes was 39.7%, 42.6%, 5.9%, 54.4%, 69.1%, 94.1%, 41.2%, 69.1%, and 83.8%, respectively. Conclusions: Our study highlights the high prevalence of plasmid-mediated quinolone resistance genes in clinical samples of K. pneumoniae in the studied region, which is alarming given the possibility of the spread of these pathogens and the few treatments available for infections brought on by multidrug-resistant strains. Moreover, the study characterizes particular mutations in the parC and gyrA genes that cause quinolone resistance.

Publisher

Briefland

Subject

Infectious Diseases,Microbiology (medical),Microbiology

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3