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An Optimized Enrichment Technique for the Isolation of Arthrobacter Bacteriophage Species from Soil Sample Isolates
Published on: April 9, 2015
Arthrobacter globiformis and Its Bacteriophage in Soil
1Department of Microbiology, The Pennsylvania State University, University Park, Pennsylvania 16802.
Applied Microbiology
|December 1, 1974
Summary
Soil bacteriophages infecting Arthrobacter globiformis are activated by nutrient amendment and incubation. Indigenous soil phages exist in a masked state, requiring specific growth conditions to increase in numbers.
Area of Science:
- Microbiology
- Soil Science
- Virology
Background:
- Bacteriophages are viruses that infect bacteria and play crucial roles in microbial ecology.
- Arthrobacter globiformis is a common soil bacterium.
- The activity and detection of bacteriophages in soil environments are influenced by various factors.
Purpose of the Study:
- To investigate the conditions required for the detection and proliferation of bacteriophages infecting Arthrobacter globiformis in soil.
- To understand the state of indigenous bacteriophages and host cells in non-amended soil.
Main Methods:
- Soil samples were nutritionally amended and incubated under controlled conditions.
- Bacteriophage and host cell populations were monitored over time.
- The interaction between added bacteriophages and indigenous host cells was examined.
Main Results:
- Bacteriophages were rarely detected in non-amended soil but were continuously produced in amended and incubated soil for at least 48 hours without added host cells.
- Indigenous bacteriophages in non-incubated soil appeared to be in a masked state, not simply adsorbed to soil particles.
- Added host cells encountered indigenous bacteriophages, but added bacteriophages did not immediately encounter sensitive indigenous host cells.
Conclusions:
- Nutritional amendment and incubation are critical for activating and detecting bacteriophages in soil.
- Indigenous soil bacteriophages exist in a masked state, requiring specific growth conditions for increased titers, potentially independent of lysogeny.
- Non-amended soil may contain non-sensitive host cells in a spheroid state that become sensitive to bacteriophages as they undergo outgrowth.
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