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Quantifying phage-host dynamics using droplet microfluidics.

Louis Givelet1, Sophie von Schönberg1, Florian Katzmeier1

  • 1Department of Bioscience, TUM School of Natural Sciences, Technical University Munich, Am Coulombwall 4a, Munich, Germany.

Nature Communications
|April 27, 2026
PubMed
Summary
This summary is machine-generated.

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This study introduces a droplet microfluidics platform for precise, high-throughput quantification of individual bacteriophage infection events. This method overcomes limitations of plaque assays, enabling dynamic monitoring of phage-host interactions for antimicrobial development.

Area of Science:

  • Microbiology and Biotechnology
  • Virology
  • Bioengineering

Background:

  • Bacteriophages (phages) are viruses that infect bacteria and have historical importance in molecular biology.
  • The rise of antibiotic resistance necessitates novel antimicrobial strategies, increasing interest in phage-based therapies.
  • Conventional double-layer plaque assays (DLA) for phage quantification are limited in temporal resolution and experimental flexibility.

Purpose of the Study:

  • To develop an advanced quantitative tool for studying individual bacteriophage infection dynamics.
  • To overcome the limitations of traditional plaque assays in monitoring infection kinetics.
  • To support the development of effective phage-based antimicrobial treatments.

Main Methods:

  • Development of a high-throughput droplet microfluidics platform.

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  • Co-encapsulation of individual bacteriophages and bacteria within microfluidic droplets.
  • Precise control over experimental parameters including phage-to-bacteria ratio and exposure time.

    • Main Results:

    • Enabled direct quantification of individual phage lysis events.
    • Allowed measurement of lysis kinetics without interference from subsequent infection cycles.
    • Demonstrated applicability across diverse phage-host systems.

    Conclusions:

    • The droplet microfluidics platform provides a dynamic, accurate, and high-throughput method for studying phage infection.
    • This technology offers a significant advancement over conventional assays for phage biology research.
    • The platform facilitates the development and optimization of bacteriophage-based antimicrobials.