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Bacterial adhesion: seen any good biofilms lately?
1Department of Pathology, Washington University School of Medicine, Barnes-Jewish Hospital, St. Louis, Missouri 63110, USA. dunne@labmed.wustl.edu
Clinical Microbiology Reviews
|April 5, 2002
Summary
Bacteria form biofilms for survival, anchoring in favorable environments and facilitating dispersal. Current antimicrobial susceptibility testing methods may not accurately reflect in-vivo conditions, impacting infection treatment.
Area of Science:
- Microbiology
- Biotechnology
- Biomedical Engineering
Background:
- Bacterial surface adhesion and biofilm development are crucial survival strategies.
- Biofilms protect bacteria from environmental stressors and facilitate nutrient exchange.
- Mature biofilms exhibit complex structures resembling underwater coral reefs.
Purpose of the Study:
- To explore the distinct phases of bacterial attachment and biofilm formation.
- To highlight the physiological differences between surface-bound and planktonic bacteria.
- To question the validity of current antimicrobial susceptibility testing models.
Main Methods:
- Review of bacterial adhesion and biofilm formation processes.
- Analysis of biofilm ultrastructure and protective mechanisms.
- Comparison of in-vitro testing methods with natural bacterial communities.
Main Results:
- Bacterial attachment involves distinct reversible and irreversible adhesion phases.
- Biofilms provide protection against dehydration, biocides, and predators.
- Surface-bound bacteria exhibit different physiology compared to planktonic forms.
Conclusions:
- Current antimicrobial susceptibility testing using planktonic cultures may not accurately represent in-vivo biofilm conditions.
- This discrepancy could explain challenges in treating infections associated with biomedical implants.
- Further research into biofilm-based testing is warranted.