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Published on: October 14, 2011
Phage growth characteristics on stationary phase Achromobacter cells
The Journal of General Virology
|November 1, 1978
Summary
Bacteriophage alpha3a exhibits unique growth on stationary phase Achromobacter, featuring a prolonged latent period and significantly larger burst sizes. Pre-conditioning bacterial cells is crucial for sustained phage propagation.
Area of Science:
- Microbiology
- Virology
- Bacteriophage Research
Background:
- Bacteriophages are viruses that infect bacteria.
- Understanding phage-host interactions is vital for applications in biotechnology and medicine.
- Stationary phase bacterial cultures present unique challenges for phage replication.
Purpose of the Study:
- To characterize the growth dynamics of bacteriophage alpha3a on stationary phase Achromobacter strain 14.
- To investigate the impact of bacterial growth phase on phage replication parameters.
- To identify optimal conditions for bacteriophage alpha3a propagation.
Main Methods:
- Culturing of Achromobacter strain 14 in both exponential and stationary phases.
- Infection of bacterial cells with bacteriophage alpha3a.
- Measurement of latent period and burst size.
- Assessment of bacterial cell viability and phage infectivity over time under different conditions.
Main Results:
- Phage alpha3a demonstrated a significantly longer latent period (6-9 hours) on stationary phase cells compared to exponential phase cells.
- Burst size was substantially increased in stationary phase cells (710 p.f.u./cell) versus exponential phase cells (153 p.f.u./cell).
- Infected stationary phase cells were highly sensitive to environmental changes, especially dilution, during the latent period.
Conclusions:
- Stationary phase Achromobacter provides a unique environment for bacteriophage alpha3a replication, leading to altered growth kinetics.
- Pre-conditioning of bacterial cells by allowing them to stand is essential for supporting sustained phage growth.
- Bacteriophage alpha3a can persist within host cells for extended periods, with the lytic cycle resuming upon favorable environmental shifts.
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