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Related Experiment Videos

Microbial biofilms

J W Costerton1, Z Lewandowski, D E Caldwell

  • 1Center for Biofilm Engineering, Montana State University, Bozeman 59717, USA.

Annual Review of Microbiology
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

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Biofilm bacteria, unlike planktonic cells, exhibit profound differences due to adhesion. These sessile organisms show significantly higher resistance to antibacterial agents and distinct gene expression, highlighting their unique adaptation.

Area of Science:

  • Microbiology
  • Environmental Science
  • Biotechnology

Background:

  • Biofilm bacteria are numerically and metabolically dominant in nutrient-rich ecosystems.
  • Sessile organisms in biofilms are implicated in various environmental, industrial, and medical issues.
  • Biofilm bacteria are fundamentally different from planktonic cells, not just surface-adhered ones.

Purpose of the Study:

  • To elucidate the distinct characteristics of biofilm bacteria compared to planktonic cells.
  • To understand the genetic and phenotypic changes triggered by bacterial adhesion.
  • To investigate the unique microenvironment and adaptations of bacteria within biofilms.

Main Methods:

  • Comparative analysis of biofilm versus planktonic bacterial cells.

Related Experiment Videos

  • Investigation of gene expression changes upon bacterial adhesion.
  • Observation of bacterial behavior and adaptation within the biofilm microenvironment.

    • Main Results:

    • Biofilm cells demonstrated at least 500 times greater resistance to antibacterial agents.
    • Bacterial adhesion was found to trigger sigma factor expression, leading to derepression of numerous genes.
    • Biofilm cells exhibit distinct phenotypes compared to their planktonic counterparts.
    • Each biofilm bacterium resides in a unique niche within a complex community exhibiting homeostasis and metabolic cooperation.

    Conclusions:

    • Bacterial adhesion profoundly alters bacterial physiology, leading to distinct phenotypes and enhanced resistance.
    • The complex microenvironment within biofilms fosters specialized adaptations and metabolic cooperativity.
    • Understanding these differences is crucial for addressing challenges in environmental, industrial, and medical microbiology.