E-ISSN 2146-9369 | ISSN 2146-3158
 

Research Article 


Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee.

Abstract
Objective: The polymyxin group of antibiotics is considered to be one of the most effective antimicrobial agents against many serious pathogenic bacteria, but the excessive use of these antibiotics has led to the development of drug resistance among bacteria. This study was designed to characterize polymyxin-resistant P. aeruginosa and to explore the role of PmrB and arnA in resistant phenotype.<br>Methods: mRNA and cDNA of five selected polymyxin-resistant strains representing different MIC range; isolated under normal condition of strain growth, after treating sample/media with FeCl3 and MgCl2 alone, or after treating with FeCl3 and polymyxin antibiotic. The transcriptional expression was observed for PmrB and arnA by quantitative real time RT-PCR in reference to P. aeruginosa PAO1. The presence of plasmid mediated colistin resistance determinants mcr-1 was screened by PCR. Susceptibility of the strains was determined by disc-diffusion method and DNA fingerprinting was carried out by performing REP-PCR.<br>Results: A down regulated expression of PmrB and arnA was observed even after the unique induction with FeCl3 and MgCl2. All the isolates were found to be resistant against cefepime and different clonal patterns of resistance were found among the isolates.<br>Conclusion: This study has drawn a new insight into polymyxin resistance which will help in the detection and control of infections caused by multidrug resistant P. aeruginosa. The low susceptibility rate to aminoglycoside, piperacllin-tazobactam and ciprofloxacin was found and in addition, detection of PmrB and arnA as molecular markers in the follow up of infections caused by multidrug resistant P. aeruginosa. J Microbiol Infect Dis 2018; 8(2):61-68

Key words: arnA, mcr-1, PmrB, Polymyxin, Pseudomonas aeruginosa, Multidrug resistance


 
ARTICLE TOOLS
Abstract
PDF Fulltext
How to cite this articleHow to cite this article
Citation Tools
Related Records
 Articles by Sayani Roy
Articles by Deepjyoti Paul
Articles by Rajkumari Elizabeth
Articles by Debadatta Dhar
Articles by Atanu Chakravarty
Articles by Amitabha Bhattacharjee
on Google
on Google Scholar


How to Cite this Article
Pubmed Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee. Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa. J Microbiol Infect Dis. 2018; 8(2): 61-68 . doi:10.5799/jmid.434595


Web Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee. Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa. https://www.jmidonline.org/?mno=302657149 [Access: February 03, 2024]. doi:10.5799/jmid.434595


AMA (American Medical Association) Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee. Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa. J Microbiol Infect Dis. 2018; 8(2): 61-68 . doi:10.5799/jmid.434595



Vancouver/ICMJE Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee. Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa. J Microbiol Infect Dis. (2018), [cited February 03, 2024]; 8(2): 61-68 . doi:10.5799/jmid.434595



Harvard Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee (2018) Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa. J Microbiol Infect Dis, 8 (2), 61-68 . doi:10.5799/jmid.434595



Turabian Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee. 2018. Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa. Journal of Microbiology and Infectious Diseases, 8 (2), 61-68 . doi:10.5799/jmid.434595



Chicago Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee. "Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa." Journal of Microbiology and Infectious Diseases 8 (2018), 61-68 . doi:10.5799/jmid.434595



MLA (The Modern Language Association) Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee. "Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa." Journal of Microbiology and Infectious Diseases 8.2 (2018), 61-68 . Print. doi:10.5799/jmid.434595



APA (American Psychological Association) Style

Sayani Roy, Deepjyoti Paul, Rajkumari Elizabeth, Debadatta Dhar, Atanu Chakravarty, Amitabha Bhattacharjee (2018) Transcriptional expression of pmrB and arnA within polymyxin resistant nosocomial isolates of Pseudomonas aeruginosa. Journal of Microbiology and Infectious Diseases, 8 (2), 61-68 . doi:10.5799/jmid.434595