Assessing Pseudomonas virulence using mammalian models: acute infection model
Antje Munder1, Burkhard Tümmler
1Clinical Research Group, Clinic for Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Hannover, Germany, munder.antje@mh-hannover.de.
Abstract:
The acute murine lung infection model monitors Pseudomonas aeruginosa airway infections by multiple continuous and endpoint parameters. After intratracheal or intranasal infection it characterizes the course of infection via head-out spirometry, rectal temperature, weight loss, a body condition score based on nine physiological parameters, lung bacterial numbers, organ dissemination of bacteria, and a semiquantitative assessment of lung inflammation and further analysis. The generated data allows a robust classification of virulence of mutant or wild-type P. aeruginosa strains and/or of the susceptibility of wild-type or engineered mouse strains to infection. If standardized, the model is applicable to the preclinical assessment of antipseudomonal prevention and intervention strategies.
Insights
This study details a mouse model for Pseudomonas aeruginosa lung infections, tracking key health and bacterial metrics. The model effectively classifies bacterial virulence and mouse susceptibility, aiding preclinical drug development.
Area of Science:
- Microbiology
- Infectious Diseases
- Animal Models
Background:
- Pseudomonas aeruginosa is a significant opportunistic pathogen causing severe lung infections.
- Accurate models are crucial for understanding P. aeruginosa pathogenesis and developing treatments.
- Existing models may not capture the full spectrum of infection dynamics.
Purpose of the Study:
- To establish and validate a comprehensive acute murine lung infection model for P. aeruginosa.
- To enable robust classification of bacterial virulence and host susceptibility.
- To support preclinical evaluation of anti-pseudomonal strategies.
Main Methods:
- Intratracheal or intranasal inoculation of P. aeruginosa in mice.
- Monitoring of continuous parameters: spirometry, rectal temperature, weight loss.
- Endpoint assessments: body condition score, lung bacterial load, organ dissemination, lung inflammation scoring.
Main Results:
- The model provides detailed characterization of infection progression.
- It allows for reliable differentiation of P. aeruginosa strain virulence.
- Host susceptibility in different mouse strains can be effectively assessed.
Conclusions:
- The standardized acute murine lung infection model is a valuable tool for P. aeruginosa research.
- It facilitates the preclinical assessment of novel prevention and intervention strategies.
- This model aids in the development of new therapies against P. aeruginosa infections.
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