Staphylococcus aureus Host Tropism and Its Implications for Murine Infection Models
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Updated: Dec 7, 2025
A Mouse Model to Assess Innate Immune Response to Staphylococcus aureus Infection
Published on: February 28, 2019
Daniel M Mrochen1, Liliane M Fernandes de Oliveira1, Dina Raafat1,2
1Department of Immunology, Institute of Immunology and Transfusion Medicine, University Medicine Greifswald, Ferdinand-Sauerbruch-Strasse DZ 7, 17475 Greifswald, Germany.
Abstract:
Staphylococcus aureus (S. aureus) is a pathobiont of humans as well as a multitude of animal species. The high prevalence of multi-resistant and more virulent strains of S. aureus necessitates the development of new prevention and treatment strategies for S. aureus infection. Major advances towards understanding the pathogenesis of S. aureus diseases have been made using conventional mouse models, i.e., by infecting naïve laboratory mice with human-adapted S.aureus strains. However, the failure to transfer certain results obtained in these murine systems to humans highlights the limitations of such models. Indeed, numerous S. aureus vaccine candidates showed promising results in conventional mouse models but failed to offer protection in human clinical trials. These limitations arise not only from the widely discussed physiological differences between mice and humans, but also from the lack of attention that is paid to the specific interactions of S. aureus with its respective host. For instance, animal-derived S. aureus lineages show a high degree of host tropism and carry a repertoire of host-specific virulence and immune evasion factors. Mouse-adapted S.aureus strains, humanized mice, and microbiome-optimized mice are promising approaches to overcome these limitations and could improve transferability of animal experiments to human trials in the future.
Insights
Developing new Staphylococcus aureus (S. aureus) treatments requires better animal models. Host-specific interactions are key to improving the transferability of S. aureus research findings from animals to humans.
Area of Science:
- Microbiology
- Immunology
- Veterinary Medicine
Background:
- Staphylococcus aureus (S. aureus) is a significant pathogen in humans and animals, with increasing multi-resistant strains.
- Conventional mouse models are widely used to study S. aureus pathogenesis but show limitations in translating results to human trials.
- Numerous S. aureus vaccine candidates successful in mice have failed in human clinical trials.
Purpose of the Study:
- To highlight the limitations of conventional mouse models for S. aureus research.
- To emphasize the importance of host-specific interactions in S. aureus pathogenesis.
- To propose improved animal models for better translation of research findings.
Main Methods:
- Review of existing literature on S. aureus pathogenesis and animal models.
- Analysis of S. aureus host tropism and specific virulence factors.
- Discussion of novel approaches like mouse-adapted strains, humanized mice, and microbiome-optimized mice.
Main Results:
- Conventional mouse models often fail to predict human responses to S. aureus infections and treatments.
- S. aureus exhibits host-specific adaptations, including virulence and immune evasion factors.
- Animal-derived S. aureus lineages display distinct host tropism.
Conclusions:
- Physiological differences and host-specific interactions limit the translatability of current mouse models for S. aureus.
- Mouse-adapted strains, humanized mice, and microbiome-optimized mice offer promising avenues to enhance model relevance.
- These advanced models could improve the success rate of S. aureus interventions in human clinical trials.
