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Related Experiment Videos

Bovine rumenitis - liver abscess complex: a bacteriological review.

C M Scanlan, T L Hathcock

    The Cornell Veterinarian
    |July 1, 1983
    PubMed
    Summary

    Fusobacterium necrophorum causes bovine liver abscesses. Biotype A is found in pure cultures in abscesses, while Biotype B is often found with other bacteria, including Corynebacterium pyogenes, which can worsen the disease.

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    Area of Science:

    • Veterinary Microbiology
    • Ruminant Pathology

    Background:

    • Fusobacterium necrophorum is a normal rumen inhabitant.
    • It is the primary cause of bovine liver abscesses.
    • Three biotypes (A, B, C) exist, with A and B linked to disease.

    Purpose of the Study:

    • To differentiate the roles of Fusobacterium necrophorum biotypes in bovine liver abscesses.
    • To identify bacterial co-inhabitants in mixed infections.

    Main Methods:

    • Isolation and identification of bacterial species from ruminal lesions and liver abscesses.
    • Analysis of pure vs. mixed culture prevalence.

    Main Results:

    • Biotype B predominates in ruminal lesions.
    • Biotype A is the predominant biotype in liver abscesses, often in pure culture.
    • Biotype B is frequently isolated from mixed cultures, commonly with Corynebacterium pyogenes.

    Conclusions:

    • Fusobacterium necrophorum biotypes A and B play distinct roles in bovine liver abscess pathogenesis.
    • Corynebacterium pyogenes is a significant co-pathogen, potentially exacerbating disease severity in mixed infections.

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