Related Experiment Video

Updated: Jul 20, 2026

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
07:10

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues

Published on: February 19, 2019

[Communication systems in bacteria and their role in pathogenicity]

T S Il'ina, Iu M Romanova, A L Gintsburg

    Molekuliarnaia Genetika, Mikrobiologiia I Virusologiia
    |September 1, 2006
    PubMed
    Summary

    Bacteria use Quorum Sensing (QS) systems to control gene expression, influencing pathogenicity and biofilm formation. Understanding QS offers new strategies against resistant bacterial infections.

    More Related Videos

    Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling08:51

    Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling

    Published on: June 25, 2015

    A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling11:16

    A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling

    Published on: July 22, 2017

    Related Concept Videos

    Regulation of Bacterial Virulence01:28

    Regulation of Bacterial Virulence

    Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...
    Gram-negative Bacterial Protein Secretion Systems01:17

    Gram-negative Bacterial Protein Secretion Systems

    Gram-negative bacteria utilize sophisticated protein secretion systems to transport proteins across their double-membrane envelope into the extracellular environment or host cells. Based on their mechanism of action, these systems are classified into one-step and two-step pathways.One-Step Secretion Systems (Types I, III, IV, and VI)One-step secretion systems bypass the periplasm entirely, forming a continuous channel that spans both the inner and outer membranes:Type I Secretion System (T1SS):...
    Bacterial Signaling01:30

    Bacterial Signaling

    Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
    Determinants of Bacterial Pathogenicity and Virulence01:20

    Determinants of Bacterial Pathogenicity and Virulence

    Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...
    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...
    Defense Against Bacterial Pathogens01:31

    Defense Against Bacterial Pathogens

    The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
    Phagocytes
    Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...