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Related Experiment Videos

Toxoplasma gondii and mucosal immunity.

Lloyd Kasper1, Nathalie Courret, Sylvie Darche

  • 1Department of Microbiology, Dartmouth Medical School, Lebanon, NH 03756, USA.

International Journal for Parasitology
|March 9, 2004
PubMed
Summary

Toxoplasma gondii infection triggers complex immune responses in the gut. This review details the interplay between immune cells and intestinal tissues during oral infection.

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Area of Science:

  • Immunology
  • Parasitology
  • Gastroenterology

Background:

  • Toxoplasma gondii is an intracellular parasite.
  • Oral infection with T. gondii initiates immune responses.
  • Intestinal inflammation, specifically ileitis, can occur in susceptible hosts.

Purpose of the Study:

  • To review the immune interactions within the gut-associated lymphoid tissue (GALT) following oral T. gondii infection.
  • To describe the roles of different immune cells in the host response.
  • To explain the mechanisms regulating inflammation during infection.

Main Methods:

  • Review of existing literature on T. gondii gut immunology.
  • Analysis of cytokine and chemokine production by host cells.
  • Examination of immune cell populations in the lamina propria and intraepithelial lymphocytes.

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Main Results:

  • Oral T. gondii infection induces both innate and adaptive immune responses.
  • Enterocytes and CD4 T cells produce inflammatory mediators to combat the parasite.
  • CD8 intraepithelial lymphocytes secrete TGF-beta, which dampens inflammation.

Conclusions:

  • A complex network of immune interactions occurs in the GALT after oral T. gondii infection.
  • Balancing parasite clearance and inflammation control is crucial.
  • Understanding these interactions provides insights into host-parasite dynamics in the gut.