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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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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...
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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...
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Entamoeba histolytica, a protozoan parasite, is responsible for intestinal and extraintestinal amebiasis. Though a significant proportion of infections remain asymptomatic, approximately 50 million individuals annually are estimated to present with clinical disease, resulting in up to 100,000 deaths globally. The disease burden is disproportionately high in regions with lower socioeconomic status, such as parts of India, Africa, Mexico, and Latin America.Etiology and TransmissionThe infective...
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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...
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Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...

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Superior Auto-Identification of Trypanosome Parasites by Using a Hybrid Deep-Learning Model
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Trypanosomatid parasites causing neglected diseases.

K Nussbaum1, J Honek, C M C v C Cadmus

  • 1Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls University Heidelberg, Im Neuenheimer Feld 364,69120 Heidelberg, Germany.

Current Medicinal Chemistry
|February 20, 2010
PubMed
Summary
This summary is machine-generated.

Neglected parasitic diseases like Kala azar, Chagas, and African sleeping sickness impact millions. This review details current treatments and novel therapies, addressing drug toxicity and resistance challenges in parasitic disease management.

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Area of Science:

  • Medical Parasitology
  • Tropical Medicine
  • Drug Discovery

Background:

  • Kala azar, Chagas disease, and African sleeping sickness are major neglected tropical diseases affecting over 27 million globally.
  • These parasitic infections cause approximately 150,000 deaths annually, with no available vaccines.
  • Current treatment relies solely on chemotherapeutic drugs, which often exhibit significant toxicity and increasing resistance.

Purpose of the Study:

  • To provide a comprehensive review of established and emerging treatments for Kala azar, Chagas disease, and African sleeping sickness.
  • To discuss novel small molecule-based therapeutic approaches for these neglected parasitic diseases.
  • To highlight the challenges of drug toxicity and resistance in trypanosomatid disease treatment.

Main Methods:

  • Literature review of established chemotherapeutic agents for visceral leishmaniasis, American trypanosomiasis, and African trypanosomiasis.
  • Exploration of novel therapeutic strategies, including small molecules and potential drug targets.
  • Analysis of current treatment limitations, focusing on toxicity and drug resistance.

Main Results:

  • Established drugs for Kala azar include pentavalent antimonials, Amphotericin B, Miltefosine, and Paromomycin; liposomal formulations show promise.
  • Chagas disease treatment relies on Nifurtimox and Benznidazole, with potential new targets identified from T. cruzi genome sequencing.
  • African sleeping sickness treatments include Suramin, Pentamidine, Melarsoprol, and Eflornithine; combination therapy with Eflornithine and Nifurtimox is a new option.

Conclusions:

  • Current chemotherapeutic options for trypanosomatid diseases are limited by toxicity and increasing resistance.
  • Novel therapeutic approaches and drug targets are crucial for improving treatment efficacy and patient compliance.
  • Further research into antiproliferative compounds and specific molecular targets is needed for neglected parasitic diseases.