Related Experiment Video
Updated: Dec 5, 2025
Simultaneous Isolation of Principal Central Nervous System-Resident Cell Types from Adult Autoimmune Encephalomyelitis Mice
Published on: October 6, 2023
Encephalitozoon cuniculi Genotype II Concentrates in Inflammation Foci
Klára Brdíčková1,2, Bohumil Sak3, Nikola Holubová3,4
1Department of Clinical Microbiology, Bulovka Hospital, Prague, Czech Republic.
Background:
Microsporidia of the genus Encephalitozoon are generally connected with severe infections with lethal outcome in immunodeficient hosts. In immunocompetent hosts, microsporidiosis typically establishes a balanced host-parasite relationship that produces minimal clinically overt disease. Although the alimentary tract represents one of the main primary target tissues, the mechanisms of reaching other tissues during systemic microsporidian infections remain unclear.
Methods:
In the present study, we tested the relation between inflammation induction in immunocompetent and immunodeficient mice and the presence of spores of E. cuniculi genotype II in selected organs and in fecal specimens by using molecular and histology methods.
Results:
We reported the positive connection between inflammation induction and the significant increase of E. cuniculi genotype II occurrence in inflammation foci in both immunocompetent BALB/c and immunodeficient severe combined immunodeficient (SCID) mice in the acute phase of infection and the re-activation of latent microsporidial infection following inflammation induction in immunocompetent mice.
Conclusion:
The results imply possible involvement of immune cells serving as vehicles transporting E. cuniculi genotype II purposefully across the whole host body towards inflammation. With increasing number of records of infections, it is necessary to reconsider microsporidia as agents responsible for various pathologies. The elucidation of possible connection with pro-inflammatory immune responses represents an important challenge with consequences for human health and development of therapeutic strategies.
Insights
Inflammation can trigger the spread of Encephalitozoon cuniculi (E. cuniculi) genotype II in both immunocompetent and immunodeficient mice. This suggests immune cells may transport the parasite, highlighting microsporidia
Area of Science:
- Parasitology
- Immunology
- Microbiology
Background:
- Microsporidia, particularly Encephalitozoon species, cause severe, often fatal, infections in immunodeficient individuals.
- In immunocompetent hosts, infections are typically mild, with the alimentary tract as a primary site, but systemic spread mechanisms are poorly understood.
Purpose of the Study:
- To investigate the relationship between induced inflammation and the dissemination of Encephalitozoon cuniculi (E. cuniculi) genotype II in mice.
- To determine if inflammation influences parasite presence in various organs and fecal samples in different immune states.
Main Methods:
- Utilized molecular and histological techniques to detect E. cuniculi genotype II spores.
- Infected both immunocompetent (BALB/c) and immunodeficient (SCID) mice.
- Induced inflammation in infected mice to observe its effect on parasite distribution.
Main Results:
- Demonstrated a positive correlation between induced inflammation and increased E. cuniculi genotype II occurrence at inflammation sites in both mouse models.
- Observed reactivation of latent E. cuniculi infections in immunocompetent mice following inflammation induction.
- Confirmed parasite presence in selected organs and fecal specimens.
Conclusions:
- Results suggest immune cells may act as carriers for E. cuniculi genotype II, facilitating its transport to inflammatory sites.
- Recommends reconsidering microsporidia as potential agents in diverse pathologies.
- Emphasizes the need to understand the link between pro-inflammatory responses and microsporidiosis for human health and therapeutic development.
