Molecular Analysis of the Presence of pvl, spa, and mecA Genes and Their Correlation with a Range of Antibiotics in Staphylococcus aureus Collected from Burn Patients

Rezashateri, Mahsa; Ahrabi, Mahsa; Salehi, Mitra

doi:10.30699/ijmm.15.6.625

year 15, Issue 6 (November - December 2021) Iran J Med Microbiol 2021, 15(6): 625-637 | Back to browse issues page

‎ 10.30699/ijmm.15.6.625

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Rezashateri M, Ahrabi M, Salehi M. Molecular Analysis of the Presence of pvl, spa, and mecA Genes and Their Correlation with a Range of Antibiotics in Staphylococcus aureus Collected from Burn Patients. Iran J Med Microbiol 2021; 15 (6) :625-637
URL: http://ijmm.ir/article-1-1350-en.html

Molecular Analysis of the Presence of pvl, spa, and mecA Genes and Their Correlation with a Range of Antibiotics in Staphylococcus aureus Collected from Burn Patients

Mahsa Rezashateri¹

, Mahsa Ahrabi²

, Mitra Salehi

1- MSc in Molecular Genetics, Department of Genetics, Faculty of Biological Sciences, Islamic Azad Univesity, North Tehran Branch, Tehran, Iran
2- PhD in Microbiology, Department of Biology, Faculty of Biological Sciences, Islamic Azad University, North Tehran Branch, Tehran, Iran
3- Assistant Professor of Genetics, Department of Genetics, Faculty of Basic Sciences, Islamic Azad University, Tehran, Iran , mitra_salehi_microbiology@yahoo.com

Abstract: (4622 Views)

Background and Objective: Staphylococcus aureus is one of the most important human pathogens and common causes of nosocomial and acquired infections in the world. The aim of this study was to investigate antibiotic resistance in methicillin-resistant S. aureus (MRSA) strains and the molecular properties of S. aureus strains.
Materials and Methods: For this purpose, a descriptive study was performed in 2017 on 56 strains of S. aureus isolated from clinical specimens. MecA subclasses were also determined by Multiplex RCR reaction. The pvl and spa genes in these strains were determined by PCR reaction.
Results: The highest resistance of the strains was observed to be to the antibiotics oxacillin, cefoxytime and erythromycin, and vancomycin (12.5%). 100% of methicillin-resistant S. aureus strains contained mecA gene, and more than 50% of isolated strains were associated with nosocomial infections. In addition, 3SCCmec type and 1 SCCmec type were identified as the dominant subtypes in this study and (17.8%). Also, 10 isolated strains could not be typed.
Conclusion: The results showed that the spa gene distribution was present in 82% of the samples. Out of 46 samples, 40 samples belonged to wound samples. Also, pvl gene was observed in 12% (7 samples) of samples. There is an association between mecA gene and resistance to the antibiotics oxacillin, cefoxitin, and erythromycin in methicillin-resistant S. aureus strains.

Keywords: Antibiotic resistance, mecA, pvl, spa, Staphylococcus aureus

Full-Text [PDF 958 kb] (1009 Downloads) | | Full-Text (HTML) (1794 Views)

Type of Study: Original Research Article | Subject: Medical Bacteriology
Received: 2021/05/30 | Accepted: 2021/09/1 | ePublished: 2021/12/8

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