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Updated: Jun 19, 2026
06:10
Following Cell-fate in E. coli After Infection by Phage Lambda
Published on: October 14, 2011
FURTHER OBSERVATIONS ON THE MECHANISM OF PHAGE ACTION
A P Krueger1, E J Scribner, B B Brown
1Department of Bacteriology, University of California, Berkeley.
The Journal of General Physiology
|October 30, 2009
Summary
This study investigated bacteriophage-bacterium interactions using advanced techniques. Findings reveal distinct intracellular phage production phases and support the activity assay
Area of Science:
- Microbiology and Virology
- Bacteriophage-Bacterium Interactions
- Molecular Biology
Background:
- Bacteriophage-bacterium interactions are crucial in microbial ecology and biotechnology.
- Previous studies on phage-bacterium reactions lacked detailed kinetic analysis.
- Understanding phage replication cycles is key to controlling bacterial infections.
Purpose of the Study:
- To elucidate the kinetic steps in the antistaphylococcal phage-bacterium reaction.
- To evaluate the efficacy of activity assay and plaque count methods in phage quantification.
- To investigate the influence of pH and temperature on phage sorption and replication.
Main Methods:
- Utilized activity assay and plaque count for phage quantification.
- Employed short-interval sampling (0.1-hour intervals) for detailed kinetic analysis.
- Separated extracellular phage from cell-bound fractions using filtration (<95% free phage passage).
Main Results:
- Identified distinct phases of phage sorption, intracellular production, and release.
- Observed rapid phage sorption followed by intracellular phage formation and redistribution.
- Demonstrated temperature-dependent phage sorption, suggesting a non-physical adsorption mechanism.
Conclusions:
- The activity assay is reliable for quantifying phage bound to susceptible cells.
- Phage production involves distinct intracellular stages, supporting the precursor theory.
- Kinetic analysis reveals complex phage-bacterium dynamics under varying conditions.
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