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Multiplex PCR Assay for Typing of Staphylococcal Cassette Chromosome Mec Types I to V in Methicillin-resistant Staphylococcus aureus
09:03

Multiplex PCR Assay for Typing of Staphylococcal Cassette Chromosome Mec Types I to V in Methicillin-resistant Staphylococcus aureus

Published on: September 5, 2013

Molecular techniques for MRSA typing: current issues and perspectives

P A Trindade1, J A McCulloch, G A Oliveira

  • 1Pharmaceutical Science School, São Paulo University, São Paulo, Brazil.

The Brazilian Journal of Infectious Diseases : an Official Publication of the Brazilian Society of Infectious Diseases
|June 17, 2003
PubMed

Insights

Molecular typing methods are crucial for tracking Methicillin-Resistant Staphylococcus aureus (MRSA) hospital infections. Techniques like Pulsed-Field Gel Electrophoresis (PFGE) and Multi-Locus Sequence Typing (MLST) aid in controlling outbreaks and understanding epidemiology.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Epidemiology

Background:

  • Staphylococcus aureus is a significant human pathogen, causing severe infections, particularly in hospital settings.
  • The rise of Methicillin-Resistant Staphylococcus aureus (MRSA) and potential vancomycin resistance necessitates rapid and reliable methods for infection control.
  • Effective containment of outbreaks requires accurate characterization of isolates and identification of clonal spread.

Purpose of the Study:

  • To review molecular typing techniques for characterizing Staphylococcus aureus isolates, focusing on Methicillin-Resistant Staphylococcus aureus (MRSA).
  • To evaluate the utility of various molecular typing methods in identifying clonal spread and facilitating infection control measures within hospitals.
  • To highlight the importance of these techniques in managing nosocomial infections and preventing outbreaks.

Main Methods:

  • Plasmid profile analysis
  • Chromosomal DNA analysis (enzymatic restriction, Southern blotting)
  • Pulsed-field gel electrophoresis (PFGE)
  • Polymerase chain reaction (PCR) based techniques, including Repetitive DNA Sequence PCR (rep-PCR)
  • Multilocus Sequence Typing (MLST)

Main Results:

  • Repetitive DNA Sequence PCR (rep-PCR) is practical, cost-effective, and reproducible for screening.
  • Pulsed-Field Gel Electrophoresis (PFGE) remains the gold standard for MRSA typing due to its high discriminatory power.
  • Multilocus Sequence Typing (MLST) offers high reproducibility and discriminatory power, particularly valuable for global epidemiology.

Conclusions:

  • Molecular typing techniques are essential tools for assessing MRSA outbreaks.
  • These methods enable the implementation of targeted infection control strategies.
  • Continued use and development of molecular typing are vital for managing staphylococcal infections in healthcare settings.

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