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Tuberculin-specific transfer factor in dogs

M R Simon, J Silva, D Freier

    Infection and Immunity
    |October 1, 1977
    PubMed
    Summary
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    Transfer factor, a substance that transfers cell-mediated immunity, was successfully transferred between dogs, demonstrating its presence in canines. Further research is needed to understand the reasons for variable transfer success rates.

    Area of Science:

    • Immunology
    • Veterinary Medicine
    • Cellular Biology

    Background:

    • Cell-mediated immunity plays a crucial role in immune responses.
    • Transfer factor is a molecule known to transfer specific immune responses.
    • Investigating transfer factor in canine models is important for comparative immunology.

    Purpose of the Study:

    • To determine if transfer factor-like substances are present in dogs.
    • To assess the efficacy of transferring tuberculin-specific sensitivity in canines.
    • To explore the relationship between skin test reactivity and in vitro lymphocyte transformation.

    Main Methods:

    • Dogs were sensitized to tuberculoprotein using Freund adjuvant.
    • Blood from sensitized dogs was used to produce transfer factor.

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  • Recipient dogs received tuberculin-specific transfer factor.
  • Tuberculin sensitivity was measured by skin tests and in vitro lymphocyte transformation assays.

    • Main Results:

    • Successful transfer of tuberculin sensitivity was achieved in 5 out of 9 recipient dogs.
    • Canine lymphocyte cultures showed generally lower responses to mitogens.
    • A dissociation between skin test reactivity and lymphocyte transformation was observed in 2 dogs.
    • Increases in lymphocyte transformation to phytohemagglutinin were noted in 3 recipient dogs.

    Conclusions:

    • Transfer factor-like substances are present in dogs.
    • The transfer of specific cell-mediated immunity is possible in canines.
    • Variable success rates in transfer factor efficacy require further investigation.