molecular characterisation of panton–valentine leucocidin-producing methicillin-resistant staphylococcus aureus clones isolated from the main hospitals in taif, ksa

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ID: 190902
2016
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Abstract
Introduction: Panton–Valentine leucocidin (PVL) is a bicomponent pore-forming cytolytic toxin encoded by the lukF-PV and lukS-PV genes. Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) may carry the pvl genes which may be related to increased disease severity. This study aimed to characterise the PVL-producing MRSA recovered from different Taif Hospitals, Saudi Arabia. Methods: The study included 45 hospital-acquired-MRSA (HA-MRSA) and 26 CA-MRSA strains which were identified from 445 S. aureus strains isolated from different clinical samples. MRSA strains were identified by standard oxacillin salt agar screening procedure and by the detection of the mecA gene by the polymerase chain reaction (PCR). Detection of the S. aureus-specific femA, mecA and pvl genes was performed by multiplex PCR. PCR-restriction fragment length polymorphism (PCR-RFLP) analysis was done for coagulase (coa) gene. Results: The staphylococcal cassette chromosome mec types of the 45 HA-MRSA strains were Type I (n = 24), Type II (n = 7) and Type III (n = 14) whereas the 26 CA-MRSA strains were Type IV (n = 14), Type V (n = 11) and one isolate was non-typeable. All the HA-MRSA and six CA-MRSA strains were PVL-negative PCR-RFLP analysis of coa gene showed that PVL-positive MRSA (n = 20) isolates showed six different patterns, and five patterns were shared by PVL-positive methicillin-susceptible S. aureus (MSSA). The eighth pattern was the most frequent in both MRSA and MSSA. Conclusion: PVL is more frequent among CA-MRSA than MSSA. All the HA-MRSA and 25% of CA-MRSA strains were negative for PVL. The pvl gene was related to the severity of infection but not related to coa gene RFLP pattern.
Reference Key
eed2016indianmolecular Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;E M Eed;M M Ghonaim;Y M Hussein;S S Al-Shehri;A S Khalifa
Journal bjog : an international journal of obstetrics and gynaecology
Year 2016
DOI
10.4103/0255-0857.195364
URL
http://www.ijmm.org/article.asp?issn=0255-0857;year=2016;volume=34;issue=4;spage=476;epage=482;aulast=Eed
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