Related Experiment Video
Updated: Aug 11, 2026

10:48
Intravital Microscopy Imaging of the Liver following Leishmania Infection: An Assessment of Hepatic Hemodynamics
Published on: July 28, 2015
Leishmania major infection: the overture
1Institute for Clinical Microbiology and Immunology, University of Erlangen, Germany.
Parasitology Today (Personal Ed.)
|October 1, 1995
Summary
Early parasite spread dictates Leishmania major infection outcome. The timing and location of initial encounters between Leishmania and immune cells influence whether mice develop resistance or susceptibility, impacting T helper cell responses.
Area of Science:
- Immunology
- Parasitology
- Infectious Diseases
Background:
- Leishmania major infection in mice causes either healing (Th1 response) or death (Th2 response).
- While T-cell responses and disease outcomes are known, the initial immune response triggers are unclear.
Purpose of the Study:
- To investigate the early events that initiate the adaptive immune response to Leishmania major.
- To explore how parasite dissemination kinetics influence the development of resistance or susceptibility.
Main Methods:
- Discussion of parasite spread dynamics from the infection site.
- Analysis of the temporal and spatial aspects of initial host-parasite interactions.
Main Results:
- Parasite spread to immune organs within 10-24 hours is critical.
- The 'where and when' of the first Leishmania encounter shapes the immune response.
Conclusions:
- Early parasite dissemination patterns are key determinants of Leishmania major infection outcome.
- Understanding these initial events is crucial for developing strategies against leishmaniasis.
Related Concept Videos
Symbiosis
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
Leishmaniasis
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...
Malaria
Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
Toxoplasmosis
Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...
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...
Antiprotozoal 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...

