Related Experiment Video
Updated: Jun 8, 2026
07:49
Using the Protozoan Paramecium caudatum as a Vehicle for Food-borne Infections in Zebrafish Larvae
Published on: January 7, 2019
A lesson in survival, by Giardia lamblia
Andrea S Rópolo1, Maria C Touz
1Instituto de Investigación Médica Mercedes y Martín Ferreyra, INIMEC – CONICET, Córdoba. Argentina. aropolo@immf.uncor.edu
Thescientificworldjournal
|October 19, 2010
Summary
This review explores how the parasite Giardia lamblia survives host immune responses. It highlights the enzyme arginine deiminase
Area of Science:
- Parasitology
- Immunology
- Molecular Biology
Background:
- Host-parasite interactions involve complex evolutionary mechanisms.
- Hosts utilize innate and acquired immune responses to combat parasites.
- Parasites have evolved strategies to evade host immunity, including antigenic variation.
Purpose of the Study:
- To analyze the survival mechanisms of the protozoan parasite Giardia lamblia.
- To examine the role of arginine deiminase in Giardia lamblia gut colonization.
- To discuss potential drug targets for giardiasis treatment.
Main Methods:
- Literature review of host-parasite interactions.
- Analysis of Giardia lamblia's immune evasion strategies.
- Examination of the function of arginine deiminase.
Main Results:
- Giardia lamblia employs diverse mechanisms to evade host immunity.
- Arginine deiminase plays a crucial role in parasite survival and gut colonization.
- Antigenic variation is a key strategy for parasite persistence.
Conclusions:
- Understanding Giardia lamblia survival mechanisms is vital for developing effective treatments.
- Arginine deiminase represents a promising target for anti-giardiasis therapies.
- Further research into parasite-host immune crosstalk can reveal new therapeutic avenues.
Related Concept Videos
01:12Giardiasis
Giardiasis is a globally prevalent intestinal infection caused by the protozoan parasite Giardia duodenalis (also known as G. lamblia or G. intestinalis). This flagellated protozoan is the most frequently identified intestinal parasite in the United States and worldwide. Transmission primarily occurs via the fecal-oral route, with infection arising from ingestion of water or food contaminated with cysts. Individuals in low-resource settings, international travelers, outdoor enthusiasts, daycare...
01:28Amebiasis
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...
01:28Fungal Phylum Microsporidia
Microsporidia are a group of obligate intracellular fungi that were initially classified as protists but were later reclassified based on phylogenetic, molecular, and structural evidence linking them to the Chytridiomycota. These unicellular, non-motile organisms are highly specialized parasites that infect a wide range of animal hosts, including humans. They have evolved extensive genomic and metabolic reductions, making them highly dependent on their hosts for survival.Morphology and Genomic...
01:15Diversity of Protists I
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...
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...
01:22Microbial Interactions: Parasitism
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...