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Related Experiment Videos

Transmissible gastroenteritis virus: plaques and a plaque neutralization test.

F C Thomas, G C Dulac

    Canadian Journal of Comparative Medicine : Revue Canadienne De Medecine Comparee
    |April 1, 1976
    PubMed
    Summary
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    Researchers studied transmissible gastroenteritis virus (TGEV) and hemagglutinating encephalomyelitis virus (HEV) using a plaque neutralization test. The test proved reliable and sensitive for TGEV detection, distinguishing it from HEV.

    Area of Science:

    • Veterinary Virology
    • Animal Pathology
    • Microbiology

    Background:

    • Transmissible gastroenteritis virus (TGEV) and hemagglutinating encephalomyelitis virus (HEV) are significant swine pathogens.
    • Accurate diagnostic methods are crucial for controlling TGEV outbreaks.

    Purpose of the Study:

    • To evaluate a plaque neutralization test in porcine thyroid cells for characterizing TGEV isolates.
    • To compare the plaque neutralization test with conventional methods for TGEV diagnosis.

    Main Methods:

    • A plaquing system and plaque neutralization assay were employed using porcine thyroid cells.
    • Different TGEV isolates and HEV were analyzed for plaque characteristics and neutralization reactions.
    • Results were compared between experimentally infected pigs and a field outbreak scenario.

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    Main Results:

    • TGEV isolates exhibited variable plaque sizes, with recent isolates producing smaller plaques than laboratory strains or HEV.
    • All TGEV isolates reacted with TGEV antiserum, while HEV did not.
    • The plaque neutralization test demonstrated high reliability and greater sensitivity than the conventional tube test.

    Conclusions:

    • The plaque neutralization test is a sensitive and reliable method for identifying and differentiating TGEV isolates.
    • This assay is superior to conventional tube tests for TGEV diagnosis in both experimental and field settings.