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Bile Salt-induced Biofilm Formation in Enteric Pathogens: Techniques for Identification and Quantification
Published on: May 6, 2018
Biofilm formation by haloarchaea.
Sabrina Fröls1, Mike Dyall-Smith, Felicitas Pfeifer
1Department of Biology, Technische Universität Darmstadt, Schnittspahnstrasse 10, 64287, Darmstadt, Germany.
Environmental Microbiology
|October 13, 2012
Summary
Biofilm formation is common in haloarchaea, with 13 of 20 tested strains adhering to surfaces. These microbes form diverse biofilms, including carpet-like structures and cell aggregates, utilizing extracellular polymers for stability.
Area of Science:
- Microbiology
- Extremophile Research
- Biofilm Science
Background:
- Haloarchaea are archaea thriving in extreme saline environments.
- Biofilm formation is crucial for microbial survival and adaptation.
- Understanding haloarchaeal biofilms can reveal novel survival strategies.
Purpose of the Study:
- To investigate biofilm formation across diverse haloarchaeal species.
- To characterize the structures and components of haloarchaeal biofilms.
- To assess the viability and attachment mechanisms of haloarchaeal biofilms.
Main Methods:
- Live-cell adhesion assay using fluorescence microscopy.
- Differential interference contrast, fluorescence, and confocal microscopy for biofilm structure analysis.
- Staining techniques to identify extracellular polymeric substances.
Main Results:
- Thirteen of 20 haloarchaeal strains exhibited significant surface adhesion.
- Two distinct biofilm structures were observed: carpet-like and aggregate-based.
- Extracellular DNA (eDNA) and glycoconjugates were identified as biofilm components.
- Cells adhered within 1 day and remained viable for at least 2 months.
Conclusions:
- Biofilm formation is prevalent in a wide range of haloarchaeal species.
- Haloarchaeal biofilms exhibit structural diversity and utilize extracellular polymers.
- Cellular appendages may play a role in initial attachment for some species.
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