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A Mouse Model to Assess Innate Immune Response to Staphylococcus aureus Infection
09:15

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Published on: February 28, 2019

Experimental phage therapy against Staphylococcus aureus in mice.

Rosanna Capparelli1, Marianna Parlato, Giorgia Borriello

  • 1Dipartimento di Scienze del Suolo, della Pianta, dell'Ambiente e delle Produzioni Animali, Università degli Studi di Napoli Federico II, Via Università 133, Portici, Naples, Italy.

Antimicrobial Agents and Chemotherapy
|May 23, 2007
PubMed
Summary

A novel bacteriophage (M(Sa)) effectively combats Staphylococcus aureus infections, including antibiotic-resistant strains. This phage demonstrates significant efficacy in clearing bacteria, preventing abscesses, and saving mice from lethal infections.

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Area of Science:

  • Microbiology
  • Virology
  • Infectious Diseases

Background:

  • Staphylococcus aureus is a significant human pathogen.
  • Antibiotic resistance in S. aureus poses a major public health challenge.
  • Bacteriophages are viruses that infect bacteria and are being explored as therapeutic agents.

Purpose of the Study:

  • To describe a novel bacteriophage, M(Sa), with activity against Staphylococcus aureus.
  • To evaluate the in vivo efficacy of M(Sa) against S. aureus infections in a mouse model.
  • To investigate the potential of M(Sa) for controlling both local and systemic S. aureus infections.

Main Methods:

  • Isolation and characterization of bacteriophage M(Sa).
  • Inoculation of mice with S. aureus and subsequent treatment with M(Sa).
  • Assessment of bacterial clearance, survival rates, and abscess formation in treated mice.
  • In vitro and in vivo evaluation of M(Sa) activity against intracellular S. aureus.

Main Results:

  • Bacteriophage M(Sa) demonstrated potent activity against S. aureus, including methicillin-resistant strains.
  • M(Sa) rescued 97% of mice infected with a lethal dose of S. aureus.
  • The phage effectively cleared bacteria in established nonlethal infections and prevented abscess formation.
  • M(Sa) was shown to kill intracellular S. aureus in vitro and in vivo.

Conclusions:

  • Bacteriophage M(Sa) is a promising therapeutic agent for controlling Staphylococcus aureus infections.
  • M(Sa) exhibits efficacy against both local and systemic S. aureus infections.
  • Phage therapy represents a viable alternative or adjunct to antibiotics for treating S. aureus infections.