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Related Experiment Video

Updated: Jul 1, 2026

Using Single-Worm Data to Quantify Heterogeneity in Caenorhabditis elegans-Bacterial Interactions
09:54

Using Single-Worm Data to Quantify Heterogeneity in Caenorhabditis elegans-Bacterial Interactions

Published on: July 22, 2022

Prokaryote-eukaryote interactions identified by using Caenorhabditis elegans.

Anton Y Peleg1, Emmanouil Tampakakis, Beth Burgwyn Fuchs

  • 1Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA 02114, USA

Proceedings of the National Academy of Sciences of the United States of America
|September 17, 2008
PubMed
Summary

Bacterial Acinetobacter baumannii inhibits fungal Candida albicans filamentation and virulence in a nematode host. Fungal farnesol, however, limits bacterial growth, revealing complex cross-kingdom dynamics in polymicrobial infections.

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Compost Microcosms as Microbially Diverse, Natural-like Environments for Microbiome Research in Caenorhabditis elegans

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Area of Science:

  • Microbiology
  • Pathogenesis
  • Infectious Disease

Background:

  • Prokaryote-eukaryote interactions are common but poorly understood, especially concerning pathogenic bacteria and fungi within hosts.
  • Investigating these interactions is crucial for understanding polymicrobial infections and developing new treatments.

Purpose of the Study:

  • To investigate the interaction between Acinetobacter baumannii (bacteria) and Candida albicans (fungus) using Caenorhabditis elegans as a model host.
  • To elucidate the mechanisms and consequences of this cross-kingdom interaction on virulence and host survival.

Main Methods:

  • Co-infection of C. elegans with A. baumannii and C. albicans.
  • In vitro assays in planktonic and biofilm conditions.
  • Screening of an A. baumannii mutant library.
  • Analysis of C. albicans filamentation and quorum sensing molecule farnesol.

Main Results:

  • A. baumannii inhibited C. albicans filamentation, reducing fungal virulence and improving nematode survival.
  • C. albicans, via farnesol, inhibited A. baumannii growth, demonstrating a counter-defense mechanism.
  • Identification of A. baumannii mutants with reduced inhibitory activity against C. albicans.

Conclusions:

  • The C. elegans model effectively simulates polymicrobial infections, offering insights into bacterial-fungal interactions.
  • A. baumannii and C. albicans engage in antagonistic interactions with implications for virulence.
  • This study provides a foundation for studying complex microbial dynamics in vivo.