Typing Clostridium difficile Strains Using Tandem Repeat Sequences
Author Information
Author(s): Zaiß N, Rupnik Maja, Kuijper Ed J, Harmanus Celine, Michielsen Dolf, Janssens Koen, Nübel Ulrich
Primary Institution: Robert Koch Institute
Hypothesis
Can tandem repeat sequences provide a reliable method for genotyping Clostridium difficile strains?
Conclusion
Sequence analysis of the two repetitive loci TR6 and TR10 is highly useful for routine typing of C. difficile, providing equal discriminatory power to PCR ribotyping.
Supporting Evidence
- Tandem repeat sequencing demonstrated excellent concordance with widely used PCR ribotyping.
- Sequence analysis of TR6 and TR10 resulted in the identification of 72 different TRST sequence types among the 154 isolates.
- TRST and PCR ribotyping had equal discriminatory power, reflected by identical discriminatory indices.
Takeaway
Scientists found two specific DNA regions in a germ called Clostridium difficile that can help tell different types of the germ apart, which is important for tracking infections.
Methodology
The study involved sequencing two tandem repeat loci (TR6 and TR10) from 154 C. difficile isolates and comparing the results with PCR ribotyping.
Limitations
The study lacked epidemiologically linked isolates, which may affect the understanding of the diversity and population biology of C. difficile.
Participant Demographics
The isolates included both international reference strains and clinical isolates from various German hospitals, collected in 2007 and 2008.
Digital Object Identifier (DOI)
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