Nasal Colonization Dynamics of Staphylococcus aureus

Staphylococcus aureus colonises the anterior nares of up to 30% of humans, establishing a dynamic equilibrium between host defences and microbial factors. Initial attachment is mediated by surface proteins such as clumping factor B and wall teichoic acids that bind to epithelial receptors, while subsequent persistence relies on regulatory pathways that balance growth, adhesion and evasion of immune surveillance. The nasal niche presents nutrient limitations and environmental stresses, to which S. aureus adapts through metabolic reprogramming and activation of biosynthetic pathways like methionine synthesis. Interactions with resident commensals shape colonisation outcomes by competing for space and nutrients or by producing bacteriocins and other antagonistic compounds. Host immunity—particularly secretory antibodies and antimicrobial peptides—exerts selective pressure that modulates microbial density and community composition, creating a finely tuned state of carriage. Persistent colonisation serves as a reservoir for opportunistic infection, underpinning risks for surgical site infections, pneumonia and bloodstream invasion. Understanding the molecular dialogues and ecological interactions underlying nasal carriage is central to designing decolonisation strategies, preventive vaccines and novel antimicrobials.

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Nasal Colonization Dynamics of Staphylococcus aureus publication trend

The graph below shows the total number of articles in nasal colonization dynamics of staphylococcus aureus across all publications each year (not limited to Nature Index journals).

Technical terms

Nasal microbiota: The community of microorganisms residing in the nasal passages.

Secretory IgA (sIgA): An antibody isotype that protects mucosal surfaces by neutralising pathogens and modulating microbiota.

Commensalism: A symbiotic relationship in which one organism benefits without harming the host or other microbes.

Virulence factor: A molecule produced by a pathogen that enhances its ability to colonise or damage the host.

Quorum sensing: A bacterial communication system that regulates gene expression in response to cell density.

References

1. Secretory IgA impacts the microbiota density in the human nose. Microbiome (2023).
2. Staphylococcus aureus Nasal Colonization: An Update on Mechanisms, Epidemiology, Risk Factors, and Subsequent Infections. Frontiers in Microbiology (2018).
3. Staphylococcus aureus Colonization: Modulation of Host Immune Response and Impact on Human Vaccine Design. Frontiers in Immunology (2014).
4. Nutrient Limitation Governs Staphylococcus aureus Metabolism and Niche Adaptation in the Human Nose. PLOS Pathogens (2014).
5. A Nasal Epithelial Receptor for Staphylococcus aureus WTA Governs Adhesion to Epithelial Cells and Modulates Nasal Colonization. PLOS Pathogens (2014).
6. Key Role for Clumping Factor B in Staphylococcus aureus Nasal Colonization of Humans. PLOS Medicine (2008).
7. Regulatory Adaptation of Staphylococcus aureus during Nasal Colonization of Humans. PLOS ONE (2010).
8. Corynebacterium pseudodiphtheriticum Exploits Staphylococcus aureus Virulence Components in a Novel Polymicrobial Defense Strategy. mBio (2019).