Related Experiment Video
Updated: Aug 13, 2026
A Non-invasive and Technically Non-intensive Method for Induction and Phenotyping of Experimental Bacterial Pneumonia in Mice
Published on: September 28, 2016
Gender is a major factor in determining the severity of mycoplasma respiratory disease in mice
A L Yancey1, H L Watson, S C Cartner
1Department of Microbiology, University of Alabama, Birmingham, Alabama, USA.
Abstract:
Gender is a significant factor in determining the susceptibility to and severity of pulmonary diseases in both humans and animals. Murine respiratory mycoplasmosis (MRM), due to Mycoplasma pulmonis infection, is an excellent animal model for evaluation of the role of various host factors on the development of acute or chronic inflammatory lung diseases. MRM has many similarities to mycoplasma respiratory disease in humans. The purpose of the present study was to determine whether gender has a significant impact on lung disease due to M. pulmonis infection in mice. It was demonstrated that male mice consistently developed more severe disease in the lung parenchyma than did female mice. There was no gender difference in disease severity along the airways or any difference in mycoplasma numbers in lungs of male and female mice. Furthermore, surgical removal of reproductive organs reduced the severity of mycoplasma disease and the numbers of mycoplasma organisms recovered from lungs. Thus, gender plays a significant role in determining the severity of M. pulmonis disease. In fact, the gender of the host was a major factor in determining whether an acute or chronic inflammatory lung disease developed after infection with M. pulmonis.
Insights
Male mice develop more severe lung inflammation from Mycoplasma pulmonis infection than females. Reproductive organ removal reduced disease severity, indicating gender significantly impacts pulmonary disease outcomes.
Area of Science:
- Immunology
- Pulmonology
- Microbiology
Background:
- Gender influences susceptibility and severity of pulmonary diseases.
- Murine respiratory mycoplasmosis (MRM) serves as a model for human respiratory diseases.
- Mycoplasma pulmonis infection causes MRM in mice.
Purpose of the Study:
- To investigate the impact of gender on lung disease severity caused by Mycoplasma pulmonis infection in mice.
- To determine if host gender influences the development of acute or chronic inflammatory lung disease.
Main Methods:
- Infection of male and female mice with Mycoplasma pulmonis.
- Assessment of lung parenchyma and airway disease severity.
- Quantification of Mycoplasma pulmonis load in lungs.
- Evaluation of disease severity after surgical removal of reproductive organs.
Main Results:
- Male mice exhibited significantly more severe lung parenchymal disease compared to female mice.
- No significant gender-based differences were observed in airway disease severity or mycoplasma burden.
- Surgical removal of reproductive organs led to reduced disease severity and lower mycoplasma loads.
Conclusions:
- Host gender is a critical factor in determining the severity of Mycoplasma pulmonis-induced lung disease.
- Gender influences the development of acute versus chronic inflammatory lung disease.
- Reproductive organs may play a role in modulating the host's response to Mycoplasma pulmonis infection.
