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Related Experiment Videos

Egg drop syndrome, 1976 (EDS'76).

J B McFerran

    Tijdschrift Voor Diergeneeskunde
    |October 15, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Egg Drop Syndrome 76 (EDS 76) causes shell-less or thin-shelled eggs in apparently healthy fowl. Duck adenoviruses are identified as the cause, spread through contaminated vaccines and egg transmission.

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    Egg drop syndrome.

    Progress in veterinary microbiology and immunology·1989

    Area of Science:

    • Avian pathology
    • Virology
    • Poultry science

    Background:

    • A novel clinical condition in fowl, Egg Drop Syndrome 76 (EDS 76), is characterized by the production of abnormal eggs (thin-shelled, soft-shelled, or shell-less).
    • Affected birds appear healthy, with production issues typically manifesting around 30 weeks of age as reduced output or failure to meet targets.

    Purpose of the Study:

    • To describe the clinical presentation and aetiology of EDS 76.
    • To identify the causative agent and understand its transmission dynamics.

    Main Methods:

    • Isolation and characterization of haemagglutinating viruses from affected flocks.
    • Biochemical and biological studies to identify the viral agents.
    • Epidemiological investigations to determine transmission routes.

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    Main Results:

    • Haemagglutinating viruses were isolated and identified as duck adenoviruses.
    • Evidence suggests the virus is egg-transmitted, with limited lateral spread between flocks under proper biosecurity.
    • Contaminated vaccines are postulated as a potential introduction source.

    Conclusions:

    • Duck adenoviruses are the aetiological agents of EDS 76.
    • Egg transmission is a significant factor, while lateral spread is manageable.
    • Eradication from basic breeding stock is a control strategy, as implemented in Northern Ireland.