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Related Concept Videos

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...
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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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Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
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Updated: Jun 20, 2026

Protocol for Human Blastoids Modeling Blastocyst Development and Implantation
12:09

Protocol for Human Blastoids Modeling Blastocyst Development and Implantation

Published on: August 10, 2022

[Blastocystis--an enigmatic parasite].

Christen Rune Stensvold1, Maiken Cavling Arendrup, Henrik Vedel Nielsen

  • 1Afdeling for Bakteriologi, Mykologi og Parasitologi, Statens Serum Institut, DK-2300 København S. run@ssi.dk

Ugeskrift for Laeger
|September 8, 2009
PubMed
Summary

Blastocystis, a common intestinal parasite, shows subtype-dependent pathogenicity. Specific subtypes like ST1 and ST7 are linked to symptoms, while ST3 is more common in healthy carriers.

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Morphometric Protocol for the Objective Assessment of Blastocyst Behavior During Vitrification and Warming Steps
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Published on: February 28, 2019

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Last Updated: Jun 20, 2026

Protocol for Human Blastoids Modeling Blastocyst Development and Implantation
12:09

Protocol for Human Blastoids Modeling Blastocyst Development and Implantation

Published on: August 10, 2022

Morphometric Protocol for the Objective Assessment of Blastocyst Behavior During Vitrification and Warming Steps
08:28

Morphometric Protocol for the Objective Assessment of Blastocyst Behavior During Vitrification and Warming Steps

Published on: February 28, 2019

Area of Science:

  • Microbiology
  • Parasitology
  • Human Health

Context:

  • Blastocystis is frequently detected in individuals with gastrointestinal complaints.
  • Over ten Blastocystis subtypes (STs) are identified in human and animal hosts.
  • Emerging evidence suggests a link between specific Blastocystis STs and host health outcomes.

Purpose:

  • To review the fundamental characteristics of Blastocystis.
  • To present current research on Blastocystis pathogenicity.
  • To address criticisms and limitations in existing studies.

Summary:

  • Blastocystis is found in approximately 25% of patients with suspected intestinal parasitic infections.
  • Pathogenicity varies among Blastocystis subtypes; ST1 and ST7 are associated with symptomatic cases, whereas ST3 is more prevalent in asymptomatic carriers.
  • This review synthesizes current knowledge and highlights areas for future research into Blastocystis's role in human health.

Impact:

  • Provides a comprehensive overview of Blastocystis, aiding researchers and clinicians.
  • Clarifies the subtype-specific pathogenicity, improving diagnostic and treatment strategies.
  • Identifies research gaps and critical perspectives for advancing the understanding of Blastocystis infections.