Genotyping Method for Group B Streptococcus Using SNPs
Author Information
Author(s): Honsa Erin, Fricke Thomas, Stephens Alex J, Ko Danny, Kong Fanrong, Gilbert Gwendolyn L, Huygens Flavia, Giffard Philip M
Primary Institution: Institute of Health and Biomedical Innovation, Queensland University of Technology
Hypothesis
Can a small set of single nucleotide polymorphisms (SNPs) effectively assign Streptococcus agalactiae isolates to clonal complexes?
Conclusion
A five SNP method for dividing GBS into biologically valid groups has been developed, which is suitable for high throughput surveillance.
Supporting Evidence
- The SNP set was derived from the MLST database to ensure high sensitivity for clinically significant clonal complex 17.
- A kinetic PCR method was developed to interrogate the SNPs effectively.
- The study identified a four-member SNP set that divides GBS into 10 groups.
- A fifth SNP increased sensitivity for clonal complex 17 to 100%.
- Isolates were genotyped using a robust kinetic PCR method.
Takeaway
Scientists created a new way to group a type of bacteria called Group B Streptococcus using just a few tiny changes in its DNA.
Methodology
The study used a SNP set derived from the MLST database and developed a genotyping assay based on these SNPs.
Limitations
The SNP set may not fully capture the diversity of GBS due to low genetic variation and high horizontal gene transfer.
Participant Demographics
Most isolates were from routine antenatal swabs, with some from normally sterile sites.
Digital Object Identifier (DOI)
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