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Related Experiment Videos

Canine parvovirus enteritis 2: Pathogenesis.

L Macartney, I A McCandlish, H Thompson

    The Veterinary Record
    |November 3, 1984
    PubMed
    Summary
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    This study tracked canine parvovirus (CPV) in puppies, finding virus shedding peaks days after infection, followed by antibody development. Early viral antigen appears in lymphoid tissues and intestines, indicating rapid systemic spread.

    Area of Science:

    • Veterinary Virology
    • Immunology
    • Canine Infectious Diseases

    Background:

    • Canine parvovirus (CPV) is a highly contagious pathogen causing severe gastrointestinal disease in puppies.
    • Understanding the early stages of CPV infection is crucial for developing effective treatments and vaccines.

    Purpose of the Study:

    • To investigate the temporal dynamics of canine parvovirus (CPV) shedding, antibody response, and viral distribution in young puppies following oral inoculation.
    • To characterize the systemic and tissue-specific localization of CPV antigen during the acute phase of infection.

    Main Methods:

    • Oral inoculation of puppies (8-10 weeks old) with CPV from a fecal source.
    • Monitoring fecal virus excretion and serum antibody production.
    • Utilizing immunofluorescence and immunoperoxidase techniques for viral antigen detection in various tissues, including lymphoid organs and the gastrointestinal tract.

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    Main Results:

    • Fecal virus excretion commenced by day 3, peaked between days 4-7, and then declined.
    • Serum antibodies were detectable from day 5, with high titers observed from day 7 onwards.
    • Viral antigen was detected early in lymphoid tissues (thymus, lymph nodes, spleen) and bone marrow, followed by intestinal localization.

    Conclusions:

    • Canine parvovirus (CPV) replicates rapidly, leading to early viraemia and widespread antigen distribution in lymphoid and intestinal tissues.
    • The observed kinetics of viral shedding and antibody production provide insights into the pathogenesis of CPV infection.
    • Early detection of viral antigen in specific tissues highlights potential targets for antiviral interventions.