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Updated: Jun 24, 2025
Development and Assessment of Intracellular Infection Models for Staphylococcus aureus
Published on: January 17, 2025
The pathogenicity and virulence of the opportunistic pathogen Staphylococcus epidermidis
Órla Burke1, Merve S Zeden, James P O'Gara1
1Microbiology, School of Biological and Chemical Sciences, University of Galway, Galway, Ireland.
Abstract:
The pervasive presence of Staphylococcus epidermidis and other coagulase-negative staphylococci on the skin and mucous membranes has long underpinned a casual disregard for the infection risk that these organisms pose to vulnerable patients in healthcare settings. Prior to the recognition of biofilm as an important virulence determinant in S. epidermidis, isolation of this microorganism in diagnostic specimens was often overlooked as clinically insignificant with potential delays in diagnosis and onset of appropriate treatment, contributing to the establishment of chronic infection and increased morbidity or mortality. While impressive progress has been made in our understanding of biofilm mechanisms in this important opportunistic pathogen, research into other virulence determinants has lagged S. aureus. In this review, the broader virulence potential of S. epidermidis including biofilm, toxins, proteases, immune evasion strategies and antibiotic resistance mechanisms is surveyed, together with current and future approaches for improved therapeutic interventions.
Insights
Staphylococcus epidermidis, often overlooked, poses significant infection risks in healthcare. This review details its virulence factors beyond biofilms, including toxins and immune evasion, for better treatment strategies.
Area of Science:
- Microbiology
- Infectious Diseases
- Pathogen Virulence
Background:
- Coagulase-negative staphylococci, particularly Staphylococcus epidermidis, are common skin flora.
- Historically underestimated, S. epidermidis is an opportunistic pathogen causing significant healthcare-associated infections.
- Biofilm formation is a key virulence factor, but other determinants are less understood.
Purpose of the Study:
- To survey the broader virulence potential of Staphylococcus epidermidis.
- To review current and future therapeutic interventions against S. epidermidis infections.
Main Methods:
- Literature review of S. epidermidis virulence factors.
- Analysis of biofilm, toxins, proteases, immune evasion, and antibiotic resistance.
- Survey of therapeutic strategies.
Main Results:
- S. epidermidis possesses diverse virulence factors beyond biofilms.
- Research on toxins, proteases, and immune evasion lags behind biofilm studies.
- Antibiotic resistance is a significant challenge.
Conclusions:
- A comprehensive understanding of S. epidermidis virulence is crucial for effective treatment.
- Targeting multiple virulence mechanisms may overcome antibiotic resistance.
- Further research into non-biofilm virulence factors is needed.
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