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Experimental hamster enteritis: an electron microscopic study.

C S Frisk, J E Wagner

    American Journal of Veterinary Research
    |November 1, 1977
    PubMed
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    Hamster enteritis (HE) is caused by two bacteria. Escherichia coli are seen early, while Campylobacter-like organisms appear later in hamster ileal epithelial cells.

    Area of Science:

    • Veterinary Pathology
    • Microbiology
    • Gastroenterology

    Background:

    • Hamster enteritis (HE) is a significant disease affecting weanling hamsters.
    • The causative agents and pathological mechanisms of HE require further elucidation.
    • Ultrastructural analysis is crucial for identifying microbial pathogens in intestinal diseases.

    Purpose of the Study:

    • To experimentally induce hamster enteritis (HE) in weanling hamsters.
    • To identify the bacterial organisms present in the ileal epithelium during HE using electron microscopy.
    • To compare ultrastructural findings in experimentally induced and naturally occurring HE.

    Main Methods:

    • Experimental induction of HE via oral inoculation of ileal suspensions.
    • Electron microscopy examination of ileal tissues from control and infected hamsters.

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  • Comparative ultrastructural analysis of naturally occurring HE cases.

    • Main Results:

    • Escherichia coli were identified within epithelial cells early in experimentally induced HE.
    • Campylobacter-like organisms were observed later in the disease, specifically within hyperplastic epithelial cells.
    • Campylobacter-like organisms were also present in the hyperplastic ileal epithelium of hamsters with naturally occurring HE.

    Conclusions:

    • Two distinct bacterial species, Escherichia coli and Campylobacter spp., are implicated in the pathogenesis of hamster enteritis.
    • The sequential appearance of these bacteria suggests a potential role in the disease progression.
    • Ultrastructural evidence supports the involvement of these bacteria in both experimental and natural cases of HE.