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American Trypanosomiasis01:22

American Trypanosomiasis

Chagas disease, or American trypanosomiasis, is a vector-borne parasitic infection caused by Trypanosoma cruzi, a flagellated protozoan (kinetoplastid) of the family Trypanosomatidae. The disease is endemic in Latin America, although cases are increasingly reported worldwide due to human migration. Transmission most commonly occurs when feces of infected triatomine bugs contaminate bite wounds or mucosal surfaces; additional routes include congenital, transfusional, transplant-related, and oral...
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Immunophenotypic lymphocyte profiles in human african trypanosomiasis.

Caroline Boda1, Bertrand Courtioux, Pierre Roques

  • 1Université de Limoges, IFR 145 GEIST, Institut de Neurologie Tropicale, EA 3174 NeuroEpidémiologie Tropicale et Comparée, Faculté de Médecine, Limoges, France.

Plos One
|July 9, 2009
PubMed
Summary

Human African trypanosomiasis (HAT) involves altered immune cell profiles, with increased B lymphocytes but decreased T lymphocytes in patients. Cerebrospinal fluid B-cell levels correlate with disease severity, aiding staging.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Neuroscience

Background:

  • Human African trypanosomiasis (HAT) is a severe parasitic disease with poorly understood cellular immune responses.
  • Understanding immune cell dynamics is crucial for diagnosing and staging HAT.

Purpose of the Study:

  • To investigate leukocyte immunophenotypes in HAT patients compared to healthy controls.
  • To correlate immune cell profiles with disease severity and cerebrospinal fluid (CSF) markers.

Main Methods:

  • Multiparameter flow cytometry was used to analyze blood and CSF samples from HAT patients and controls.
  • Subsets and activation markers of B and T lymphocytes were evaluated.

Main Results:

  • HAT patients showed higher blood B lymphocyte percentages and activation, but reduced CD4+ T cell activation.
  • Reduced memory and effector CD8+ T cells were observed in HAT patients.
  • CSF CD19+ B-cell levels increased with HAT disease severity, unlike blood markers.

Conclusions:

  • Immune cell patterns in HAT suggest potential immunomodulatory mechanisms during infection.
  • CSF CD19+ B-cell quantification may enhance HAT disease staging and management.