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Related Experiment Video

Updated: Oct 19, 2025

Quantification of Interbacterial Competition using Single-Cell Fluorescence Imaging
07:34

Quantification of Interbacterial Competition using Single-Cell Fluorescence Imaging

Published on: September 2, 2021

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Quantification of Interbacterial Competition using Single-Cell Fluorescence Imaging.

Stephanie Smith1, Alecia N Septer2

  • 1Department of Earth, Marine, and Environmental Sciences, University of North Carolina.

Journal of Visualized Experiments : Jove
|September 20, 2021
PubMed
Summary

This study presents a fluorescence microscopy method to visualize and quantify bacterial competition at the single-cell level. The technique allows for detailed analysis of interactions impacting microbiome structure and function.

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Last Updated: Oct 19, 2025

Quantification of Interbacterial Competition using Single-Cell Fluorescence Imaging
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Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
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Area of Science:

  • Microbiology
  • Microbiome Research
  • Microscopy Techniques

Background:

  • Interbacterial competition significantly influences microbiome composition and function.
  • Understanding these interactions is crucial for microbiome research.
  • Current methods may lack single-cell resolution for competitive dynamics.

Purpose of the Study:

  • To develop and describe a fluorescence microscopy protocol for visualizing and quantifying bacterial competition.
  • To enable single-cell level analysis of competitive interactions between bacterial strains.
  • To provide a adaptable method for studying diverse bacterial communities.

Main Methods:

  • Utilizing epifluorescence microscopy (upright and inverted) with advanced slide preparation.
  • Employing live-cell and time-lapse imaging techniques.
  • Performing quantitative image analysis using open-source FIJI software to measure changes in bacterial strain area over time.

Main Results:

  • The protocol successfully visualizes and quantifies competitive interactions between bacterial strains at the single-cell level.
  • Demonstrated quantification of competitive interactions in symbiotic Vibrio fischeri populations.
  • The method is reproducible and adaptable for various bacterial model systems and growth conditions.

Conclusions:

  • This fluorescence microscopy approach offers a powerful tool for studying bacterial competition in microbiomes.
  • The protocol is versatile and can be adapted to analyze diverse culturable bacterial isolates.
  • The findings contribute to a deeper understanding of microbiome dynamics driven by interbacterial interactions.