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Ulcerative dermatitis in the rat.

J G Fox, S M Niemi, J C Murphy

    Laboratory Animal Science
    |October 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Ulcerative dermatitis in Sprague Dawley rats was linked to specific suppliers and diets. Controlling rat sourcing eliminated the condition, suggesting environmental or genetic factors over pathogens.

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    Area of Science:

    • Veterinary Pathology
    • Animal Science
    • Microbiology

    Background:

    • Ulcerative dermatitis affected Sprague Dawley rats from specific suppliers.
    • Lesions were more common in males and rats on an agar-based diet.
    • The condition involved moist ulcers on the shoulders and neck.

    Purpose of the Study:

    • Investigate the cause of ulcerative dermatitis in rats.
    • Identify contributing factors and potential etiologic agents.
    • Determine methods for preventing the condition.

    Main Methods:

    • Clinical observation and lesion characterization.
    • Bacteriological and virological testing (Staphylococcus aureus, sialodacryoadenitis virus).
    • Dietary analysis and intervention (agar base diet).

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  • Environmental control (rat procurement from specific breeding areas).

    • Main Results:

    • Staphylococcus aureus was isolated but experimental inoculation showed low efficacy.
    • Sialodacryoadenitis virus was present in affected and unaffected rats.
    • Agar-based diet and specific supplier/breeding area were associated with higher incidence.
    • Toenail clipping reduced lesion severity.
    • Selective procurement of rats eliminated the disease.

    Conclusions:

    • Ulcerative dermatitis in this rat model was likely multifactorial, influenced by genetics and diet.
    • While Staphylococcus aureus was present, it may not have been the primary cause.
    • Controlling the source and environment of Sprague Dawley rats effectively prevented ulcerative dermatitis.