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Human serum and plasma increase mouse mortality in Staphylococcus aureus intraperitoneal infection
Acta Pathologica, Microbiologica, Et Immunologica Scandinavica. Section B, Microbiology
|December 1, 1984
Summary
Human plasma and serum significantly increase Staphylococcus aureus virulence in mice. This suggests a role for these blood components in establishing human S. aureus infections.
Area of Science:
- Microbiology
- Immunology
- Infectious Diseases
Background:
- Staphylococcus aureus is a significant human pathogen.
- Understanding factors that influence bacterial virulence is crucial for infection control.
Purpose of the Study:
- To investigate the impact of human plasma, serum, fibrinogen, and fibronectin on Staphylococcus aureus virulence in a murine model.
- To determine if these human biological components enhance or inhibit S. aureus infection severity.
Main Methods:
- Intraperitoneal infection model using non-immune mice challenged with S. aureus strains.
- Administration of S. aureus with or without human plasma, serum, purified fibrinogen, or fibronectin.
- Assessment of bacterial virulence based on mouse mortality rates.
Main Results:
- Both human plasma and serum significantly enhanced S. aureus virulence.
- The enhancing effect of serum on virulence was observed even after storage or complement inactivation.
- Purified fibrinogen and fibronectin did not demonstrate any influence on S. aureus virulence.
Conclusions:
- Human plasma and serum components play a critical role in augmenting Staphylococcus aureus virulence.
- These findings suggest that plasma and serum may contribute to the establishment and severity of S. aureus infections in humans.