Host-Pathogen Interactions in Staphylococcus Aureus Infections
Summary
Staphylococcus aureus is an adaptable Gram-positive pathogen responsible for a spectrum of diseases ranging from superficial skin infections to life-threatening sepsis and endocarditis. Central to its success is a dynamic interplay with the host immune system: surface adhesins and secreted effectors mediate attachment and invasion of host tissues, while a repertoire of toxins, including enterotoxins and haemolysins, subvert immune defences. Innate recognition through pattern‐recognition receptors triggers reactive oxygen species (ROS) production and antimicrobial peptides, yet S. aureus deploys counter-measures such as catalase and superoxide dismutase to neutralise oxidative stress. Biofilm formation on indwelling devices further shields bacterial communities from phagocytic clearance and antibiotics. Recent advances have illuminated how regulatory networks (for example the accessory gene regulator, Agr) fine-tune virulence factor expression in response to host cues. A detailed understanding of these host–pathogen interactions underpins the development of new therapeutic strategies, including anti-virulence agents, vaccines and immunomodulatory approaches, and is crucial to tackling the global challenge of antibiotic-resistant S. aureus.
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Host-Pathogen Interactions in Staphylococcus Aureus Infections publication trend
The graph below shows the total number of articles in host-pathogen interactions in staphylococcus aureus infections across all publications each year (not limited to Nature Index journals).
Technical terms
Reactive oxygen species (ROS): Chemically reactive oxygen derivatives generated by host cells to kill invading pathogens.
Dual oxidase (Duox): Host NADPH oxidase enzyme producing hydrogen peroxide as an antimicrobial defence.
Toll pathway: Conserved signalling cascade in innate immunity that drives expression of antimicrobial peptides.
Catalase: Bacterial enzyme that decomposes hydrogen peroxide, protecting pathogens from oxidative damage.
Enterotoxin B: Superantigenic toxin secreted by S. aureus that disrupts intestinal epithelial integrity and triggers inflammation.
References
- Reactive Oxygen Species-Dependent Innate Immune Mechanisms Control Methicillin-Resistant Staphylococcus aureus Virulence in the Drosophila Larval Model. mBio (2021).
- A mouse model of Staphylococcus aureus small intestinal infection. Journal of Medical Microbiology (2020).
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