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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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In contrast to the lytic cycle, phages infecting bacteria via the lysogenic cycle do not immediately kill their host cell. Instead, they combine their genome with the host genome, allowing the bacteria to replicate the phage DNA along with the bacterial genome. The incorporated copy of the phage genome is called the prophage. Some prophages can re-activate and enter the lytic cycle. This often occurs in response to a perturbation, such as DNA damage, but can also transpire in the absence of...
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Pseudomonas bacteriophage isolation and production.

Joana Azeredo1, Sanna Sillankorva, Diana P Pires

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Methods in Molecular Biology (Clifton, N.J.)
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This study details methods for isolating and producing bacteriophages, which are viruses that infect bacteria. These techniques are specific for Pseudomonas species, offering potential applications in controlling these bacteria.

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Area of Science:

  • Microbiology
  • Virology
  • Bacteriophage research

Background:

  • Bacteriophages (bacterial viruses) have been known for nearly a century.
  • These viruses are widespread in natural environments.
  • They can be isolated from diverse sources and target various bacterial hosts.

Purpose of the Study:

  • To describe established methods for bacteriophage isolation.
  • To outline techniques for bacteriophage concentration and purification.
  • To detail the production of bacteriophages specifically targeting Pseudomonas species.

Main Methods:

  • Isolation of bacteriophages from environmental samples.
  • Concentration techniques to increase phage yield.
  • Purification methods to obtain pure phage isolates.
  • Large-scale production protocols for Pseudomonas-specific phages.

Main Results:

  • Successful isolation of bacteriophages from various sources.
  • Demonstration of effective concentration and purification procedures.
  • Production of viable bacteriophage stocks targeting Pseudomonas.

Conclusions:

  • The described methods provide a framework for obtaining specific bacteriophages.
  • These techniques are crucial for further research and application of bacteriophages.
  • The study facilitates the use of bacteriophages against Pseudomonas infections.