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Related Concept Videos

Flagella and Motility in Bacteria01:18

Flagella and Motility in Bacteria

Flagella are specialized, thread-like structures that extend from a bacteria's cell envelope. They play a crucial role in motility and chemotaxis. Their structural organization and functioning exemplify sophisticated biological engineering, enabling bacterial survival and adaptability in diverse environments.Structure of the FlagellumA bacterial flagellum consists of three key components: the filament, the hook, and basal body. The filament, a long, helical structure composed of repeating...
Chemotaxis in E. coli01:27

Chemotaxis in E. coli

Chemotaxis in Escherichia coli is a sensory-driven motility mechanism that enables bacteria to navigate chemical gradients, moving toward beneficial environments while avoiding harmful conditions. This process relies on a signal transduction system integrating external chemical cues with flagellar motor control.Chemoreceptors and Signal DetectionE. coli detects chemical gradients through methyl-accepting chemotaxis proteins (MCPs), which are membrane-bound chemoreceptors that sense attractants...
Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...
Fimbriae, Pili, and Axial Filaments01:28

Fimbriae, Pili, and Axial Filaments

Fimbriae and pili are specialized bacterial surface structures that play pivotal roles in adhesion, genetic exchange, and motility. Composed primarily of pilin protein, these hairlike appendages are crucial for bacterial survival and pathogenicity in various environments.Fimbriae: Adhesion and PathogenicityFimbriae are fine, filamentous structures measuring 2–10 nanometers in diameter and are densely distributed on the bacterial cell surface. They facilitate bacterial adhesion to abiotic...
Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
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Related Experiment Video

Updated: Jun 16, 2026

Investigating Flagella-Driven Motility in Escherichia coli by Applying Three Established Techniques in a Series
07:59

Investigating Flagella-Driven Motility in Escherichia coli by Applying Three Established Techniques in a Series

Published on: May 10, 2020

To Move or Not to Move: When and How Bacteria Suppress Flagellar Motility.

Fatemeh Mohagegh1, Jacob Scadden1, Matthew A B Baker1

  • 1School of Biotechnology and Biomolecular Science, University of New South Wales, Sydney, New South Wales, Australia.

Molecular Microbiology
|June 13, 2026
PubMed
Summary

Bacteria stop moving (motility cessation) not just due to damage, but as a regulated survival strategy. This allows them to build protective biofilms, enhancing persistence against environmental challenges.

Keywords:
bacterial motilitybiofilmcyclic‐di‐GMPflagellar motormotility cessationmotility regulation

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Related Experiment Videos

Last Updated: Jun 16, 2026

Investigating Flagella-Driven Motility in Escherichia coli by Applying Three Established Techniques in a Series
07:59

Investigating Flagella-Driven Motility in Escherichia coli by Applying Three Established Techniques in a Series

Published on: May 10, 2020

Visualizing Bacterial Motility Based on a Color Reaction
04:44

Visualizing Bacterial Motility Based on a Color Reaction

Published on: February 15, 2022

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations
07:40

Monitoring Spatial Segregation in Surface Colonizing Microbial Populations

Published on: October 29, 2016

Area of Science:

  • Microbiology
  • Bacterial Physiology
  • Ecology

Background:

  • Bacterial motility is crucial for finding resources and colonizing surfaces.
  • Motility loss can be passive or an active, regulated process.
  • Cessation of motility is an adaptive strategy for survival and biofilm formation.

Purpose of the Study:

  • To review mechanisms of bacterial motility cessation.
  • To discuss functional and environmental triggers for motility suppression.
  • To highlight the adaptive significance of motility regulation.

Main Methods:

  • Literature review of studies on bacterial motility regulation.
  • Analysis of mechanisms governing flagellar suppression.
  • Synthesis of ecological and functional implications of motility cessation.

Main Results:

  • Motility cessation is a regulated adaptive strategy, not just passive loss.
  • Stopping motility redirects resources to biofilm development and stress tolerance.
  • Diverse mechanisms and signals regulate flagellar suppression across species.

Conclusions:

  • Bacterial motility cessation is a key regulated adaptation for survival and persistence.
  • This transition supports communal lifestyles within protective biofilms.
  • Understanding motility regulation is vital for bacterial ecology and pathogenesis research.