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[Enzootic dermonecrosis in chickens]

R Kasabov, S Nachev

    Veterinarno-Meditsinski Nauki
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    A Pasteurella-like organism caused necrotic dermatosis in 5000 hen layers, leading to skin lesions. The infection, linked to feather pecking, was reproduced experimentally and identified as Pasteurella multocida.

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    Area of Science:

    • Veterinary Pathology
    • Avian Diseases
    • Bacteriology

    Context:

    • An enzootic of necrotic dermatosis affected a flock of 5000 hen layers over two consecutive years.
    • Lesions were consistently located on the skin between the back and neck.
    • All birds contracted the disease, with recovery periods of 10 months in the first year and 3 months in the second.

    Purpose:

    • To describe an enzootic of necrotic dermatosis in commercial hen layers.
    • To identify the etiologic agent responsible for the skin lesions.
    • To investigate the pathogenesis and transmission of the disease.

    Summary:

    • A Pasteurella-like organism, identified as Pasteurella multocida, was isolated from necrotic skin foci.
    • The organism was pathogenic in albino mice and experimentally reproduced the disease in test birds via scarified skin.

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  • Histopathology revealed coagulation necrosis of the epidermis, derm, and subcutis, consistent between spontaneous and experimental lesions.
  • The constant localization of lesions was hypothesized to be related to the entry point of infection, possibly exacerbated by feather pecking behavior common in White Leghorn breeds.

    • Impact:

    • Identifies Pasteurella multocida as the causative agent of a specific necrotic dermatosis in laying hens.
    • Provides insights into disease transmission and localization, potentially linked to behavioral factors like feather pecking.
    • Offers valuable information for veterinary diagnostics and management strategies for similar outbreaks in poultry flocks.