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Updated: Apr 1, 2026

Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
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An update on Clostridioides difficile population structure and genomics.

Merilyn A Beebe1, Joseph A Sorg1

  • 1Department of Biology, Texas A&M University, College Station, Texas, USA.

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|March 31, 2026
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Summary
This summary is machine-generated.

Clostridioides difficile (C. diff) strains show diverse evolution across clades, impacting infection severity and treatment. Understanding genetic variation and mobile elements is key for effective C. diff infection management.

Keywords:
C. difficilecladesdiseasegenomics

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Area of Science:

  • Microbiology
  • Genomics
  • Infectious Diseases

Background:

  • Clostridioides difficile (C. diff) has been studied since 1935.
  • Thousands of C. diff isolates reveal a diverse phylogeny with five main clades and cryptic clades.
  • Clades 2 and 5 are well-studied, linked to severe C. diff infections (CDI) and recurrence.

Purpose of the Study:

  • To analyze the phylogenetic diversity of Clostridioides difficile.
  • To investigate the genetic basis of variation and its association with clinical outcomes.
  • To highlight the role of mobile genetic elements in C. diff evolution.

Main Methods:

  • Phylogenetic analysis of C. diff isolates.
  • Genomic comparison across different clades.
  • Association studies between genetic features and clinical phenotypes.

Main Results:

  • C. diff exhibits significant phylogenetic diversity across clades.
  • Accessory genome variations, often driven by mobile genetic elements, contribute to clade divergence.
  • Mobile genetic elements facilitate the co-evolution of antibiotic resistance and virulence factors.

Conclusions:

  • C. diff clades display distinct genetic characteristics and clinical associations.
  • Mobile genetic elements are crucial drivers of C. diff adaptation and evolution.
  • Future studies must incorporate diverse C. diff strains for comprehensive understanding and treatment development.