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Updated: May 2, 2026

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
Published on: December 10, 2016
The genome of Clostridium difficile 5.3
Aaron E Darling1, Paul Worden, Toni A Chapman
1ithree institute, University of Technology Sydney, Broadway Street, 2007 Ultimo, Australia. aaron.darling@uts.edu.au.
Clostridium difficile (C. diff) causes infectious diarrhea in humans and pigs, often linked to antibiotic use. Genome sequencing reveals unique virulence genes in a C. diff strain, aiding understanding of its spread and zoonotic potential.
Area of Science:
- Microbiology
- Genomics
- Infectious Diseases
Background:
- Clostridium difficile is a primary cause of infectious diarrhea in humans.
- It also causes significant enteritis outbreaks in neonatal pigs across North America and Europe.
- Emergence of C. difficile is associated with broad-spectrum antibiotic use in human and veterinary medicine.
Purpose of the Study:
- To sequence the genome of a specific Clostridium difficile strain (5.3).
- To identify potential virulence and pathogenicity genes.
- To compare the genome with existing reference strains.
Main Methods:
- Whole-genome sequencing using Illumina Nextera XT and MiSeq technologies.
- Bioinformatic assembly of sequence data into scaffolds.
- Comparative genomic analysis.
Main Results:
- A 4,009,318 bp genome was reconstructed in 27 scaffolds (N50: 786 kbp).
- The genome shares high similarity with other C. difficile genomes.
- Several novel genes potentially related to virulence and pathogenicity were identified compared to the reference strain.
Conclusions:
- Genome sequencing of human and animal C. difficile isolates is crucial.
- Understanding molecular events driving C. difficile emergence as a pathogen is needed.
- Further research can better define the zoonotic potential of C. difficile.
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