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Related Concept Videos

Giardiasis01:12

Giardiasis

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...
Amebiasis01:28

Amebiasis

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...
Fungal Phylum Microsporidia01:28

Fungal 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...
Diversity of Protists I01:15

Diversity 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...
Bacterial Gastroenteritis01:18

Bacterial Gastroenteritis

Bacterial gastroenteritis, characterized by diarrhea, abdominal cramps, and vomiting, is often caused by ingestion of contaminated food or water and is frequently associated with pathogenic Escherichia coli strains. These microbes exploit two principal mechanisms to inflict disease.Shiga toxin–producing E. coli, also referred to as STEC—notably O157:H7—release Shiga toxins that target ribosomes, blocking protein synthesis. The B subunit of the toxin binds the host glycolipid receptor...
Microbial Interactions: Parasitism01:22

Microbial 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...

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Related Experiment Video

Updated: Jun 5, 2026

Comparative Analysis of Automatic Fecal Analyzer versus Direct Wet Smear Microscopy for Detecting Parasitic Infections in Stool Samples
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Comparative Analysis of Automatic Fecal Analyzer versus Direct Wet Smear Microscopy for Detecting Parasitic Infections in Stool Samples

Published on: April 25, 2025

Gastrointestinal parasitic infections.

J A Embil, J M Embil

    Canadian Family Physician Medecin De Famille Canadien
    |January 22, 2011
    PubMed
    Summary

    This review covers key human gastrointestinal parasites, detailing their transmission, effects, and management. Understanding these infections is crucial for diagnosing gastrointestinal issues in diverse patient populations.

    Area of Science:

    • Medical Parasitology
    • Gastroenterology
    • Infectious Diseases

    Background:

    • Gastrointestinal parasites are a significant global health concern.
    • Their importance in clinical practice is rising due to various factors.
    • Differential diagnosis of gastrointestinal disorders must include parasitic infections.

    Purpose of the Study:

    • To provide a comprehensive overview of major human gastrointestinal parasites.
    • To examine the acquisition, pathology, epidemiology, diagnosis, and treatment of these parasites.

    Main Methods:

    • Literature review and synthesis of current knowledge on gastrointestinal parasites.
    • Examination of factors contributing to the increased prevalence and clinical relevance.

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    Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children
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    Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children

    Published on: August 22, 2012

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    Last Updated: Jun 5, 2026

    Comparative Analysis of Automatic Fecal Analyzer versus Direct Wet Smear Microscopy for Detecting Parasitic Infections in Stool Samples
    04:57

    Comparative Analysis of Automatic Fecal Analyzer versus Direct Wet Smear Microscopy for Detecting Parasitic Infections in Stool Samples

    Published on: April 25, 2025

    Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children
    10:57

    Determining Soil-transmitted Helminth Infection Status and Physical Fitness of School-aged Children

    Published on: August 22, 2012

    Main Results:

    • Key gastrointestinal parasites affecting humans are identified.
    • Modes of acquisition, disease mechanisms, and epidemiological patterns are discussed.
    • Diagnostic approaches and therapeutic strategies are outlined.

    Conclusions:

    • Gastrointestinal parasites represent a growing challenge in diagnosing and managing gastrointestinal diseases.
    • Increased international travel, immunocompromised individuals, and specific social factors contribute to their prevalence.
    • Awareness and appropriate diagnostic/treatment protocols are essential for effective patient care.