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[Comparative evaluation of methods of obtaining phagolysates modelled on d'Herelle's plague microbe phage]
Abstract:
Various methods for phage multiplication have been tested: the method of cellophane membranes, the method of combined media, the method of forced aeration of a liquid medium, growth at suboptimal temperature and growth at optimal temperature under stationary conditions. The phage in a high concentration (n X 10(10) plaque-forming units per ml) can be obtained by any of these methods with the exception of the last one yielding lower (by 1 or 2 orders) effectiveness of multiplication. The main factors which determine the titer of the phage in lysate are concentration of live cells in the suspension and temperature of growth.
Insights
Different methods effectively multiply bacteriophages to high concentrations. Key factors for achieving high phage titers in lysates include live cell concentration and growth temperature.
Area of Science:
- Microbiology
- Virology
- Bacteriophage Research
Background:
- Bacteriophages are viruses that infect bacteria.
- Efficient bacteriophage multiplication is crucial for various applications, including phage therapy and diagnostics.
- Optimizing phage production methods is essential for obtaining high yields.
Purpose of the Study:
- To evaluate and compare different methods for bacteriophage multiplication.
- To identify the most effective techniques for achieving high bacteriophage titers.
- To determine the critical factors influencing bacteriophage yield in lysates.
Main Methods:
- Cellophane membrane method for phage cultivation.
- Combined media approach for phage propagation.
- Forced aeration of liquid media to enhance phage growth.
- Cultivation at suboptimal and optimal temperatures under stationary conditions.
Main Results:
- High bacteriophage concentrations (n X 10(10) plaque-forming units/ml) were achievable using most tested methods.
- The method of growth at optimal temperature under stationary conditions resulted in lower phage multiplication effectiveness (1-2 orders lower).
- Bacteriophage titer in lysates is primarily determined by the concentration of live bacterial cells and the incubation temperature.
Conclusions:
- Several methods are suitable for high-yield bacteriophage multiplication.
- Stationary growth at optimal temperature is less effective for maximizing phage titers.
- Live cell concentration and growth temperature are critical parameters for optimizing bacteriophage lysate production.