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Updated: Mar 31, 2026

Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
Published on: July 19, 2019
Role of Chlamydia in Multiple Sclerosis
M V Ivanova1, N I Kolkova2, E Yu Morgunova2
1Center of Neurology, Moscow, Russia. fspsbl@gmail.com.
Abstract:
Chlamydia and antibodies to them were detected by serological, molecular biological, and culture methods in the sera and cerebrospinal fluid of patients with multiple sclerosis and in the reference groups of subjects without neurological diseases. Correlations between the agent presence in the biological fluids of patients and clinical characteristics of the disease were analyzed. C. pneumoniae were more incident in the biological liquids of patients with multiple sclerosis than in healthy volunteers. On the other hand, the incidence of the agent in the patients was not high and its presence did not correlate with the clinical manifestations. C. trachomatis was equally rare in the patients and volunteers. The studies indicated the existence of a group of patients infected by C. pneumoniae in the cohort of patients with multiple sclerosis, but the impact of this agent for the disease course remains unclear.
Insights
Chlamydia pneumoniae infection was more frequent in multiple sclerosis patients than controls, but its presence did not correlate with disease severity. Further research is needed to clarify the role of C. pneumoniae in multiple sclerosis pathogenesis.
Area of Science:
- Neuroimmunology
- Infectious Diseases
- Microbiology
Background:
- Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system.
- The potential role of infectious agents, such as Chlamydia species, in MS pathogenesis is under investigation.
Purpose of the Study:
- To investigate the presence of Chlamydia pneumoniae and Chlamydia trachomatis in patients with multiple sclerosis.
- To analyze correlations between Chlamydia species detection and clinical characteristics of MS.
Main Methods:
- Serological, molecular biological, and culture methods were employed.
- Detection was performed in sera and cerebrospinal fluid.
- Patients with MS were compared to neurologically healthy reference groups.
Main Results:
- Chlamydia pneumoniae was detected more frequently in biological fluids of MS patients compared to controls.
- The overall incidence of C. pneumoniae in MS patients was low and did not correlate with clinical manifestations.
- Chlamydia trachomatis incidence was similarly low in both MS patients and controls.
Conclusions:
- A subset of multiple sclerosis patients may be infected with Chlamydia pneumoniae.
- The etiological or pathogenetic significance of Chlamydia pneumoniae in multiple sclerosis remains uncertain and requires further investigation.
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