Related Experiment Video
Updated: Aug 14, 2026

07:59
Bioluminescence Imaging to Detect Late Stage Infection of African Trypanosomiasis
Published on: May 18, 2016
Human African trypanosomiasis: clinical presentation and immune response
1Zoology Building, School of Biological Sciences, University of Aberdeen, UK. j.sternberg@abdn.ac.uk
Parasite Immunology
|March 18, 2005
Summary
Human African trypanosomiasis, or sleeping sickness, is a rising threat due to drug resistance and unrest. This study explores variations in disease severity and asymptomatic cases, linking them to immunology and host genetics.
Area of Science:
- Neglected tropical diseases
- Parasitology
- Immunology
Background:
- Human African trypanosomiasis (sleeping sickness) is a tsetse-fly-borne parasitic disease with significant historical and developmental impact in sub-Saharan Africa.
- Incidence is increasing due to factors like civil unrest and potential drug resistance, challenging control efforts.
- While typically fatal without treatment, variations in disease severity and asymptomatic carriage are reported, suggesting complex host-parasite interactions.
Purpose of the Study:
- To examine the immunological basis for observed variations in human African trypanosomiasis (sleeping sickness) presentation.
- To investigate the role of dysregulated inflammatory responses in systemic and central nervous system (CNS) pathology.
- To discuss the potential influence of host genetic variation on disease severity and control.
Main Methods:
- Review of existing literature on the immunology of trypanosomiasis.
- Analysis of case reports and epidemiological data on disease severity variations.
- Examination of genetic studies related to host susceptibility and resistance.
Main Results:
- Significant variations in human African trypanosomiasis (sleeping sickness) severity exist, with some individuals exhibiting asymptomatic carriage.
- Dysregulated inflammatory responses contribute to both systemic and CNS pathology in infected individuals.
- Host genotype variation is a potential factor influencing disease progression and outcomes.
Conclusions:
- Understanding the immunological and genetic factors underlying disease variability is crucial for effective sleeping sickness control.
- Further research into host-parasite interactions can reveal new therapeutic targets and strategies.
- Addressing the complexities of sleeping sickness requires a multifaceted approach considering immunology, genetics, and socio-environmental factors.
Related Concept Videos
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...
Trichomoniasis
Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.
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...

