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[Stress and immunity in cattle].

I May, I Mănoiu, C Donta

    Archiv Fur Experimentelle Veterinarmedizin
    |January 1, 1979
    PubMed
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    Bovine stress, induced by hormones or heat, can impair immunity to paratyphoid (Salmonella dublin 81) vaccination. The degree of immune suppression depends on stress timing, duration, and calf age.

    Area of Science:

    • Veterinary immunology
    • Animal stress physiology

    Background:

    • Parenteral administration of supercortisol and acute thermal load can induce variable stress in calves.
    • Hormonal or thermal stress may negatively impact postvaccinal immunity.

    Purpose of the Study:

    • To investigate the impact of induced stress on postvaccinal immunity to paratyphoid (Salmonella dublin 81) in calves.
    • To determine factors influencing stress-induced immune suppression.

    Main Methods:

    • Calves were subjected to stress via supercortisol administration or thermal load.
    • Immunity was assessed by measuring the O-agglutination titre of blood serum.
    • Stress application timing, duration, and calf age were varied.

    Main Results:

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    • Both hormonal and thermal stress negatively affected postvaccinal immunity to paratyphoid.
    • The O-agglutination titre was used to interpret the level of immune suppression.
    • The extent of immunity suppression was dependent on stress application timing, duration, and calf age.

    Conclusions:

    • Stress significantly impacts the effectiveness of vaccination against paratyphoid in calves.
    • Understanding the variables of stress is crucial for optimizing vaccination strategies in cattle.
    • Further research into stress mitigation techniques could improve animal health outcomes.