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Enayatzadeh meymandi S A, Babaeekhou L, Ghane M. Distribution of Ambler Class A Β-lactamase Genes and Evaluation of Resistance Patterns in Multi-Drug and Extensively-Drug Resistant P. aeruginosa Clinical Isolates. mljgoums 2019; 13 (5) :1-7
URL: http://mlj.goums.ac.ir/article-1-1152-en.html
Distribution of Ambler Class A Β-lactamase Genes and Evaluation of Resistance Patterns in Multi-Drug and Extensively-Drug Resistant P. aeruginosa Clinical Isolates
Seyed Amin Enayatzadeh meymandi1 , Laleh Babaeekhou 2, Maryam Ghane1
1- Department of Biology, Faculty of Science, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran
2- Department of Biology, Faculty of Science, Islamshahr Branch, Islamic Azad University, Islamshahr, Iran , babaeekhou@iiau.ac.ir
Abstract:   (8056 Views)
ABSTRACT
             Background and Objectives: Emergence and spread of multidrug-resistant (MDR) and extensively-drug resistant (XDR) Pseudomonas aeruginosa strains could complicate antipseudomonal chemotherapy. Dissemination of resistance genes, such as β-lactamases encoding genes by horizontal gene transfer can lead to development of multi-drug resistance in P. aeruginosa. The purpose of this study was to investigate the latest resistance patterns in MDR and XDR strains and evaluate Ambler class A β-lactamase gene distribution in P. aeruginosa clinical isolates.
             Methods: One hundred molecularly and biochemically identified P. aeruginosa strains isolated from different clinical specimens were tested for sensitivity to 17 antibiotics using the Kirby-Bauer disk diffusion method. PCR was performed to detect bla TEM-1, bla SHV-1, bla REP-1 and bla VEB-1 genes. Results were analyzed using SPSS and NTSYSpc softwares. 
             Results: Based on the results of antibiogram, the highest rate of resistance was observed against amikacin (100%), aztreonam (83%), ceftazidime (55%), cefepime (55%) and netilmicin (48%). In addition, the frequency of MDR and XDR isolates was 95% and 5%, respectively. The blaSHV-1, bla TEM-1, bla PER-1 and bla VEB-1 genes were detected in 31%, 24%, 13% and 10% of the isolates, respectively.
             Conclusion: Antibiotic resistance to β-lactam antibiotics and frequency of β-lactamase genes were relatively high in the study area. We also found that a significant proportion of XDR strains with different antibiotic resistance profile is isolated from tracheal specimens.
             KEYWORDS: Pseudomonas aeruginosa, Beta-Lactamase, Multidrug Resistant, Extensively Drug Resistant.
Keywords: Pseudomonas aeruginosa, Beta-Lactamase, Multidrug Resistant, Extensively Drug Resistant.
Full-Text [PDF 820 kb]   (844 Downloads)    
Research Article: Original Paper | Subject: bacteriology
Received: 2018/12/8 | Accepted: 2019/05/8 | Published: 2019/09/2 | ePublished: 2019/09/2
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