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Method to Measure Tone of Axial and Proximal Muscle
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Bacteria can rotate while body tethered to a solid surface.

Jordan Bell1, Silverio Johnson2, Brandon Pugnet2

  • 1Department of Physics, Brown University, Providence, Rhode Island; PhAST Corp., Boston, Massachusetts.

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|April 20, 2025
PubMed
Summary
This summary is machine-generated.

Bacteria can attach to surfaces using their cell body, a newly identified "body tethering" method. This common attachment strategy in pililess bacteria, including Vibrio alginolyticus, is crucial for understanding bacterial adhesion and biofilm formation.

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Area of Science:

  • Microbiology
  • Cell Biology
  • Biophysics

Background:

  • Bacterial surface attachment is critical for colonization and biofilm formation.
  • Previous studies focused on pili and flagella as primary attachment mechanisms.
  • Pililess bacteria require alternative surface attachment strategies.

Purpose of the Study:

  • To investigate novel surface attachment mechanisms in pililess bacteria.
  • To characterize a previously unrecognized mode of bacterial tethering.
  • To determine the prevalence of this attachment mode in key bacterial species.

Main Methods:

  • High-intensity dark-field microscopy was employed.
  • Observation of bacterial tethering in pililess strains of Vibrio alginolyticus, Pseudomonas aeruginosa, and Caulobacter crescentus.
  • Analysis of bacterial rotation and flagellar movement during surface attachment.

Main Results:

  • A common mode of bacterial surface attachment, termed "body tethering," was identified.
  • In body tethering, bacteria attach via their cell body, not flagella or pili.
  • Body tethering was observed to be more common than flagellar tethering in the studied strains.
  • The flagellum often rotates with the cell body during body tethering.

Conclusions:

  • Body tethering is a significant and prevalent mechanism for surface attachment in pililess bacteria.
  • This finding expands our understanding of bacterial adhesion.
  • Body tethering has potential implications for controlling bacterial biofilms.