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Related Experiment Video

Updated: Jul 19, 2026

Genotyping of Staphylococcus aureus by Ribosomal Spacer PCR (RS-PCR)

Genotyping of Staphylococcus aureus by Ribosomal Spacer PCR (RS-PCR)

Published on: November 4, 2016

Staphylococcus aureus genotyping using novel real-time PCR formats.

Flavia Huygens¹, John Inman-Bamber, Graeme R Nimmo

¹Cooperative Research Centre for Diagnostics, Institute of Health and Biomedical Innovation, QUT, GPO Box 2434, Brisbane Q 4001, Australia.

Journal of Clinical Microbiology

|October 6, 2006

Summary

This study developed an automated method for genotyping Staphylococcus aureus using single-nucleotide polymorphisms (SNPs) and binary markers. The optimized approach accurately identified key MRSA clones in Australia, aiding in epidemiological surveillance.

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Genotyping of Staphylococcus aureus by Ribosomal Spacer PCR (RS-PCR)

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

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

Published on: September 5, 2013

Area of Science:

Microbiology
Genetics
Molecular Biology

Background:

Microbial genotyping is crucial for tracking pathogen evolution and outbreaks.
Existing methods for Staphylococcus aureus genotyping can be labor-intensive and time-consuming.

Purpose of the Study:

To modify and automate a single-nucleotide polymorphism (SNP)-plus-binary-marker approach for Staphylococcus aureus genotyping.
To apply this automated method to a large collection of S. aureus isolates from Australia.
To compare novel real-time PCR formats for marker interrogation.

Main Methods:

Development and automation of a SNP-plus-binary-marker genotyping assay for Staphylococcus aureus.
Utilized specific SNPs (arcC210, tpi243, etc.) and binary markers (pvl, cna, etc.).
Compared two real-time PCR formats: LUX primers and SYBR Green-based kinetic PCR, with the latter proving more robust. Automated DNA preparation, reaction setup, and data analysis were implemented.

Main Results:

The method achieved a Simpson's index of diversity (D) of 0.95, defining 61 genotypes and major clonal complexes.
Automated processes streamlined DNA template preparation, reaction setup, and data analysis.
Identified the prevalence of "South West Pacific" and "Queensland" community-acquired methicillin-resistant S. aureus (MRSA) clones, and clonal complex 239 hospital-associated MRSA.
A strong association was found between community-acquired clones and the pvl marker.

Conclusions:

The automated SNP-plus-binary-marker genotyping approach is effective and robust for S. aureus surveillance.
The method provides high discriminatory power and is suitable for large-scale epidemiological studies.
Findings highlight the importance of specific MRSA clones and their genetic markers in Australia.