Related Experiment Videos
Clinical complications of Mycoplasma pneumoniae disease--central nervous system
Abstract:
The mechanism of the neurologic complications associated with primary atypical pneumonia is unknown. To examine the ability of Mycoplasma pneumoniae to enter the brain of experimental animals, the organism was inoculated into adult and suckling mice by various routes. After intranasal infection, M. pneumoniae was isolated from brains and lungs of both groups of mice. After intracerebral inoculation, the high levels of the mycoplasma persisted for two months or more in the brains of suckling mice. In addition, after intravenous infection, the systemic spread of infection occurred in the mice treated with high doses of cyclophosphamide. Our results suggest that M. pneumoniae may be able to reach the brain via blood and it may occur with relative ease in compromised hosts.
Insights
Mycoplasma pneumoniae can invade the brain in mice, suggesting a potential cause for neurologic issues in atypical pneumonia. This pathogen may reach the brain through the bloodstream, especially in immunocompromised individuals.
Area of Science:
- Neuroscience
- Infectious Diseases
- Microbiology
Background:
- Neurologic complications are observed in primary atypical pneumonia, but the underlying mechanisms remain unclear.
- Mycoplasma pneumoniae is a common cause of atypical pneumonia.
Purpose of the Study:
- To investigate the potential of Mycoplasma pneumoniae to penetrate the brain in experimental animal models.
- To explore the routes and conditions under which M. pneumoniae may access the central nervous system.
Main Methods:
- Mycoplasma pneumoniae was inoculated into adult and suckling mice via intranasal, intracerebral, and intravenous routes.
- Mice were treated with cyclophosphamide to assess the impact on systemic spread.
- M. pneumoniae presence in brains and lungs was monitored post-infection.
Main Results:
- Intranasal infection led to M. pneumoniae isolation from both the brains and lungs of mice.
- Intracerebral inoculation resulted in persistent high levels of M. pneumoniae in the brains of suckling mice for over two months.
- Intravenous infection in cyclophosphamide-treated mice demonstrated systemic spread of the pathogen.
Conclusions:
- Mycoplasma pneumoniae possesses the ability to enter the brain in experimental animals.
- The pathogen may reach the brain via the bloodstream.
- Compromised host defenses appear to facilitate M. pneumoniae brain entry.