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2000
Volume 17, Issue 1
  • ISSN: 1874-4672
  • E-ISSN: 1874-4702

Abstract

Background

Over the last several decades, the AcrAB and OqxAB efflux pumps have been found to cause multidrug resistance (MDR) in various bacteria, most notably . Antibiotic resistance surges with increased expression of the and efflux pumps.

Methods

In accordance with CLSI guidelines, a disk diffusion test was carried out using 50 isolates obtained from various clinical samples. CT was computed in treated samples and compared to a susceptible ciprofloxacin strain (A111). The final finding is presented as the fold change in the target gene's expression in treated samples relative to a control sample (A111), normalized to a reference gene. As ∆∆CT = 0 and 2 to the power of 0 = 1, relative gene expression for reference samples is often set to 1

Results

The highest rates of resistance were recognized with cefotaxime (100%), cefuroxime (100%), cefepime (100%), levofloxacin (98%), trimethoprim-sulfamethoxazole (80%), and gentamicin (72%), whereas imipenem (34%) had the lowest rates. Overexpression of and , and , regulators , , and were greater in ciprofloxacin-resistant isolates compared to the reference strain (strain A111). There was also a moderate connection between ciprofloxacin MIC and gene expression and a moderate connection between ciprofloxacin MIC and gene expression.

Conclusion

This work provides a deeper knowledge of the role of efflux pump genes, particularly and , as well as transcriptional regulators , soxS, and , in bacterial resistance to ciprofloxacin.

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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  • Article Type:
    Research Article
Keyword(s): Antimicrobial; CCCP; Ciprofloxacin; Efflux pumps; Klebsiella pneumoniae; RT-PCR
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