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Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
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Bacteriophages, also known as phages, are specialized viruses that infect bacteria. A key characteristic of phages is their distinctive “head-tail” morphology. A phage begins the infection process (i.e., lytic cycle) by attaching to the outside of a bacterial cell. Attachment is accomplished via proteins in the phage tail that bind to specific receptor proteins on the outer surface of the bacterium. The tail injects the phage’s DNA genome into the bacterial cytoplasm. In the...
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Environmental Sampling of Photosynthetic Microbes and Their Viruses: From Field to Lab
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A simple method for enumerating bacteriophages in soil

X Yin1, L R Zeph, G Stotzky

  • 1Department of Biology, New York University, New York 1003, USA.

Canadian Journal of Microbiology
|May 1, 1997
PubMed
Summary
This summary is machine-generated.

A novel plaque technique using antibiotic-resistant bacteria significantly improved bacteriophage recovery from soil. This method enhances the isolation of essential microbial viruses from environmental samples.

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Area of Science:

  • Microbiology
  • Environmental Science
  • Virology

Background:

  • Bacteriophages are crucial for microbial ecology and potential therapeutic applications.
  • Efficient recovery of bacteriophages from environmental matrices like soil is challenging.
  • Standard isolation methods often yield suboptimal results for certain phage-host systems.

Purpose of the Study:

  • To develop and evaluate an improved plaque technique for bacteriophage recovery from nonsterile soil.
  • To compare the efficacy of the novel technique against conventional methods.
  • To investigate factors influencing bacteriophage recovery and survival in soil.

Main Methods:

  • A plaque assay utilizing antibiotic-resistant bacteria on antibiotic-containing agar was employed.
  • The technique was used for the recovery of bacteriophages P1 (Escherichia coli) and F116 (Pseudomonas aeruginosa).
  • Results were compared with standard membrane filtration and centrifugation methods.

Main Results:

  • The antibiotic-resistant bacterial plaque technique yielded significantly better recovery rates for both bacteriophages compared to standard methods.
  • Evidence suggests that phage adsorption to soil particles plays a role in their recovery and persistence.
  • The novel method demonstrated superior performance in isolating phages from complex environmental samples.

Conclusions:

  • The developed plaque technique offers a more effective approach for bacteriophage isolation from soil.
  • Understanding phage-soil interactions, particularly adsorption, is vital for optimizing recovery strategies.
  • This advancement has implications for phage-based environmental monitoring and applications.