Related Experiment Video
Updated: Jun 20, 2026
13:55
Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates
Published on: January 27, 2019
Protective immunity against Trypanosoma cruzi
Cecilia Parodi1, Angel Marcelo Padilla, Miguel Angel Basombrío
1Instituto de Patología Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Salta, Argentina.
Memorias Do Instituto Oswaldo Cruz
|September 16, 2009
Summary
Trypanosoma cruzi infection elicits immune responses with both protective and pathological effects. This review highlights the crucial role of CD8+ T cells in protective immunity against the parasite.
Area of Science:
- Immunology
- Parasitology
- Infectious Diseases
Background:
- Trypanosoma cruzi infection causes significant immune responses with dual protective and pathological outcomes.
- Understanding protective immunity is crucial for developing effective control strategies.
- Previous vaccination efforts in animal reservoirs faced practical challenges.
Purpose of the Study:
- To review key aspects of protective immunity against Trypanosoma cruzi.
- To emphasize the role of CD8+ T cells in host defense.
- To discuss vaccination strategies and clinical outcome associations.
Main Methods:
- Literature review focusing on recent and previous studies.
- Analysis of research on CD8+ T cell function and memory cell maturation.
- Examination of animal models and clinical outcome data.
Main Results:
- CD8+ T cells play a significant protective role against Trypanosoma cruzi.
- T. cruzi-specific T-cell responses and high CD8+ T cell frequency correlate with better clinical outcomes.
- Animal models demonstrate protection without immunopathology.
Conclusions:
- CD8+ T cells are critical for protective immunity against Trypanosoma cruzi.
- Immune responses associated with better clinical outcomes warrant further investigation for vaccine development.
- Developing vaccines that induce protective immunity without pathology remains a key goal.
More Related Videos
Related Concept Videos
01:22American 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...
01:21Antiprotozoal Agents
Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...
00:42Cross-reactivity
Overview
01:30Leishmaniasis
Leishmaniasis is a protozoal disease caused by species of the genus Leishmania and transmitted through the bite of infected female sandflies. The parasite exists in two principal morphological forms during its life cycle. A sandfly acquires intracellular amastigotes from an infected reservoir host, such as a dog. Within the sandfly, these forms differentiate into motile, flagellated promastigotes. During a subsequent blood meal, promastigotes are injected into the human host, where they...
01:22Development of Immunocompetence
The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
01:27Cytotoxic T Cells-mediated Immune Response
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...