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Updated: Jul 23, 2026

Diagnosis of Ecto- and Endoparasites in Laboratory Rats and Mice
Published on: September 6, 2011
Epizootic diarrhea of infant mice: indentification of the etiologic agent
Abstract:
Electron micrographs of intestinal epithelium of infant mice infected with epizootic diarrhea virus have demonstrated intracellular spherical structures measuring 65 to 75 m(micro) in diameter which have a complex morphology resembling several virus particles. They have ben interpreted as being the etiologic agent of this disease. The particles were present in association with, in some cases within, vesicles of the endoplasmic reticulum of intestinal epithelial cells. They were never seen in the nucleus.
Insights
Epizootic diarrhea virus in infant mice causes spherical particles within intestinal cells. These particles, 65-75 µm in size, are linked to endoplasmic reticulum vesicles and are considered the disease
Area of Science:
- Virology
- Cell Biology
- Gastroenterology
Background:
- Epizootic diarrhea virus (EDV) is a significant pathogen affecting infant animals.
- Understanding the viral etiology and cellular interactions is crucial for disease management.
Purpose of the Study:
- To characterize the morphology and cellular localization of the suspected etiologic agent of epizootic diarrhea virus in infant mice.
Main Methods:
- Electron microscopy was used to examine the intestinal epithelium of infected infant mice.
- Morphological analysis focused on intracellular structures associated with the disease.
Main Results:
- Spherical intracellular structures, 65-75 µm in diameter, were observed in the intestinal epithelium.
- These structures exhibited complex morphology, resembling virus particles.
- Particles were found within or associated with endoplasmic reticulum vesicles, but not in the nucleus.
Conclusions:
- The observed particles are interpreted as the etiologic agent of epizootic diarrhea virus.
- The endoplasmic reticulum appears to be involved in the replication or assembly of the virus.
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