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Related Experiment Videos

Vir typing: a long-PCR typing method for group A streptococci

D Gardiner1, J Hartas, B Currie

  • 1Menzies School of Health Research, Darwin, NT, Australia.

PCR Methods and Applications
|April 1, 1995
PubMed
Summary

We developed Vir typing, a new method for Streptococcus pyogenes analysis using long PCR and DNA cleavage. This technique offers highly discriminatory and unambiguous results for bacterial identification.

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • Streptococcus pyogenes typing is crucial for epidemiological studies.
  • Existing methods like M typing and multilocus enzyme electrophoresis have limitations.

Purpose of the Study:

  • To develop and evaluate novel DNA-based typing procedures for Streptococcus pyogenes.
  • To compare the discriminatory power of Vir typing and random amplified polymorphic DNA (RAPD) with existing methods.

Main Methods:

  • Developed Vir typing using long PCR to amplify the vir regulon, followed by HaeIII cleavage and gel electrophoresis.
  • Developed a random amplified polymorphic DNA (RAPD) procedure using DNA from 96 samples.
  • Compared Vir typing and RAPD with M typing and multilocus enzyme electrophoresis.

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Main Results:

  • Both Vir typing and RAPD demonstrated high discriminatory power.
  • Vir typing provided unambiguous results due to stoichiometric yield of restriction fragments.
  • The developed DNA extraction method was efficient for high-throughput sample processing.

Conclusions:

  • Vir typing is a highly discriminatory and reliable method for Streptococcus pyogenes identification.
  • The developed procedures offer significant advantages over traditional typing methods.
  • Vir typing's clear results make it a valuable tool in microbiology research.