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Related Concept Videos

Infection01:20

Infection

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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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Defense Mechanism Against Infection01:26

Defense Mechanism Against Infection

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Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
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Fungal Phylum Microsporidia01:28

Fungal Phylum Microsporidia

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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...
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Diversity of Protists II01:27

Diversity of Protists II

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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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Introduction to Virus01:28

Introduction to Virus

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Viruses are unique biological entities that blur the boundary between living and non-living systems. Although they lack cellular structure and metabolic processes, they can exhibit characteristics of life when infecting a host. Their defining feature is a nucleic acid core, composed of either DNA or RNA, encapsulated within a protein coat called a capsid. This simple structure allows them to invade host cells and use their machinery for replication efficiently.Viral Structure and...
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Related Experiment Video

Updated: Oct 11, 2025

Studying Inherited Immunity in a Caenorhabditis elegans Model of Microsporidia Infection
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Helminths make themselves at home.

Elia D Tait Wojno1

  • 1Department of Immunology, University of Washington, Seattle, WA.

The Journal of Experimental Medicine
|November 30, 2021
PubMed
Summary

Parasitic helminths, like Heligmosomoides polygyrus, release products that suppress the small intestine's protective epithelial response. This reveals how helminths directly alter host tissues during infection.

Area of Science:

  • Immunology
  • Parasitology
  • Gastroenterology

Background:

  • Helminth infections are common globally.
  • Understanding host-parasite interactions is crucial for developing treatments.
  • The small intestine's epithelial response plays a key role in immunity.

Purpose of the Study:

  • To investigate how Heligmosomoides polygyrus excretory/secretory products affect the host's small intestinal epithelial response.
  • To elucidate the mechanisms of helminth-induced modulation of host tissues.

Main Methods:

  • Analysis of excretory/secretory products from Heligmosomoides polygyrus.
  • Assessment of the impact on small intestinal epithelial cells.
  • Investigation of host-parasite interactions in vivo.

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Mass Isolation and In Vitro Cultivation of Intramolluscan Stages of the Human Blood Fluke Schistosoma Mansoni
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Main Results:

  • Excretory/secretory products from Heligmosomoides polygyrus were found to suppress the host-protective small intestinal epithelial response.
  • Helminths were shown to directly modulate the host's intestinal tissue.
  • This modulation impacts the host-protective mechanisms.

Conclusions:

  • Helminths possess mechanisms to directly interfere with host tissue function.
  • These findings provide new insights into the complex host-parasite relationship.
  • Targeting these suppressive mechanisms could offer therapeutic strategies.