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Related Concept Videos

Lytic Cycle of Bacteriophages01:30

Lytic Cycle of Bacteriophages

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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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Lysogenic Cycle of Bacteriophages00:43

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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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Related Experiment Video

Updated: Jul 6, 2025

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
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Chitosan-based matrix as a carrier for bacteriophages.

Monika Sikora1,2, Sławomir Wąsik3,4, Jacek Semaniak3,4

  • 1Department of Medical Biology, Institute of Biology, Jan Kochanowski University in Kielce, Kielce, Poland.

Applied Microbiology and Biotechnology
|January 2, 2024
PubMed
Summary

This study developed a chitosan-based film incorporating Pseudomonas lytic phages to create an advanced wound dressing. The material effectively immobilizes phages, which then lyse bacteria upon direct contact, accelerating wound healing.

Keywords:
Antibacterial dressingBacteriophagesChitosanPseudomonas aeruginosaWound healing

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Area of Science:

  • Biomaterials Science
  • Microbiology
  • Wound Healing Research

Background:

  • Infection prevention is critical for effective wound healing.
  • Chitosan possesses beneficial properties for wound dressings, including bactericidal, anti-inflammatory, and hemostatic effects.
  • Chitosan can serve as a matrix for bacteriophages (phages) as a novel antibacterial therapy.

Purpose of the Study:

  • To prepare and characterize a chitosan-based film incorporating Pseudomonas lytic phages.
  • To evaluate its potential as a wound dressing for accelerating healing.
  • To investigate phage-bacteria interactions within the chitosan matrix.

Main Methods:

  • Preparation of a microcrystalline chitosan (MKCh) matrix for phage deposition.
  • Characterization of the material's molar mass, swelling capacity, and surface morphology.
  • Assessment of phage release profile and antibacterial activity against Pseudomonas aeruginosa.

Main Results:

  • Chitosan effectively immobilized phage particles through electrostatic interactions.
  • The hydrophilic and swelling nature of the chitosan matrix facilitated bacterial culture absorption.
  • Phages released from the matrix directly contacted and lysed bacteria within the polymer structure.

Conclusions:

  • A novel chitosan-phage composite material was successfully developed.
  • The material demonstrates antibacterial activity via direct phage-bacteria contact within the matrix.
  • This chitosan-based phage dressing shows promise for enhancing difficult-to-heal wound treatment.