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Updated: Jul 2, 2026
Humanized Mouse Model to Study Bacterial Infections Targeting the Microvasculature
Published on: April 1, 2014
Murine models of Streptococcus pyogenes infection
Samantha Roberts1, June R Scott, Linda K Husmann
1Emory University School of Medicine, Atlanta, Georgia, USA.
Abstract:
This unit describes procedures for testing virulence of Streptococcus pyogenes in mice. S. pyogenes is an important human pathogen and causes one of the most common childhood diseases. The syndromes that result from S. pyogenes infection are diverse, ranging from mild, superficial throat or skin infection to severe, invasive disea/se that is often lethal. Thus, a greater understanding of the virulence factors of this bacterium and development of modalities to prevent or relieve the infections it causes are important. Since S. pyogenes is a strictly human pathogen (with the exception of a single strain), the value of all animal models is limited. This unit describes a model for long-term throat colonization following the natural route of infection (inhalation), one for pneumonia and systemic dissemination following intratracheal inoculation, and one for systemic dissemination following the more natural route of skin infection. In addition, methods are presented for culturing S. pyogenes from tissues of the infected animal.
Insights
This study details mouse models for testing Streptococcus pyogenes virulence, crucial for understanding this common childhood pathogen. The methods cover throat colonization, pneumonia, and skin infection, aiding in developing new treatments.
Area of Science:
- Microbiology
- Pathogen Research
- Infectious Diseases
Background:
- Streptococcus pyogenes is a significant human pathogen responsible for diverse infections, from mild to lethal.
- Understanding S. pyogenes virulence factors is critical for developing effective treatments and preventative measures.
- As a human-specific pathogen, S. pyogenes presents unique challenges for in vivo virulence studies.
Purpose of the Study:
- To describe established mouse models for evaluating Streptococcus pyogenes virulence.
- To provide methods for assessing S. pyogenes infection via natural routes like inhalation and skin contact.
- To outline techniques for culturing S. pyogenes from infected animal tissues.
Main Methods:
- Inhalation model for long-term throat colonization.
- Intratracheal inoculation model for pneumonia and systemic dissemination.
- Skin infection model for systemic dissemination.
- Tissue culture methods for S. pyogenes recovery.
Main Results:
- Established and validated mouse models for S. pyogenes virulence testing.
- Demonstrated different infection pathways and dissemination patterns.
- Provided reliable methods for pathogen recovery and analysis.
Conclusions:
- Mouse models offer valuable insights into S. pyogenes pathogenesis despite its human-specific nature.
- These models facilitate the study of virulence factors and the evaluation of potential interventions.
- The described procedures support research into Streptococcus pyogenes infections and disease control.
