Related Experiment Video
Updated: Apr 15, 2026
Pseudomonas aeruginosa Induced Lung Injury Model
Published on: October 29, 2014
Development and evaluation of murine lung-specific disease models for Pseudomonas aeruginosa applicable to
Matthew B Lawrenz1, Ashley E Biller2, Daniel E Cramer2
1Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, University of Louisville School of Medicine, Louisville, KY 40202, USA Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY 40202, USA.
Abstract:
Pseudomonas aeruginosa is an opportunistic bacterial pathogen capable of causing a wide range of disease manifestations, including severe bacterial pneumonia. Recently, clinics have reported a rise in nosocomial infections with multidrug resistant (MDR) species, including MDR strains of P. aeruginosa. In order to quickly evaluate the efficacy of new therapeutics for MDR infections, highly reproducible and validated animal models need to be developed for pre-clinical testing. Here, we describe the characterization of two murine models to study MDR P. aeruginosa respiratory disease. We evaluated and compared these models using a non-invasive intratracheal instillation method and established the 50% lethal dose, course of infection, biometric parameters of disease and degree of pneumonia development for each model. Further, we tested meropenem as a proof-of-concept therapeutic and report efficacy data that suggests that the leukopenic model could serve a robust pre-clinical model to test novel therapeutics.
Insights
This study characterizes two mouse models for studying multidrug-resistant Pseudomonas aeruginosa pneumonia. The leukopenic model shows promise for preclinical testing of new therapeutics against these challenging infections.
Area of Science:
- Microbiology
- Infectious Diseases
- Animal Models
Background:
- Pseudomonas aeruginosa is an opportunistic pathogen causing severe pneumonia.
- Rising rates of multidrug-resistant (MDR) P. aeruginosa necessitate new therapeutic strategies.
- Validated animal models are crucial for preclinical evaluation of novel treatments.
Purpose of the Study:
- To characterize and compare two murine models for studying MDR P. aeruginosa respiratory disease.
- To establish key parameters for assessing infection severity and therapeutic efficacy.
Main Methods:
- Non-invasive intratracheal instillation of MDR P. aeruginosa in two distinct murine models.
- Evaluation of 50% lethal dose (LD50), infection course, and biometric disease parameters.
- Proof-of-concept therapeutic testing using meropenem.
Main Results:
- Characterization of infection dynamics and disease progression in both models.
- Identification of a leukopenic model as a robust platform for evaluating therapeutic interventions.
- Meropenem demonstrated efficacy in the leukopenic model, validating its utility.
Conclusions:
- The characterized murine models provide a basis for studying MDR P. aeruginosa respiratory infections.
- The leukopenic model is a suitable preclinical tool for assessing novel therapeutics against MDR P. aeruginosa pneumonia.
More Related Videos
09:49Experimental Model to Evaluate Resolution of Pneumonia
Published on: February 17, 2023
09:17A Robust Pneumonia Model in Immunocompetent Rodents to Evaluate Antibacterial Efficacy against S. pneumoniae, H. influenzae, K. pneumoniae, P. aeruginosa or A. baumannii
Published on: January 2, 2017