Viral Diseases Lab Diagnosis Quiz
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Questions and Answers

Which method demonstrates the presence of the virus directly in tissues, secretions, or excretions?

  • Immunofluorescence (correct)
  • Virus neutralization
  • Isolation and characterization of the causative virus
  • Complement fixation

    • What is the principle behind the ELISA technique?

  • Enzyme-labeled antibody binds to antigen; substrate changes color (correct)
  • Antibody inhibits viral hemagglutination
  • Antibody neutralizes infectivity of virion
  • Antigen-antibody complex binds complement, which is thereafter unavailable for the lysis of hemolysis-sensitized sheep RBC

    • Which technique involves the binding of peroxidase-labeled antibody to intracellular antigen, forming a colored precipitate?

  • Immunoelectron microscopy
  • Radioimmunoassay
  • Immunoperoxidase staining (correct)
  • Immunodiffusion

    • What does the complement fixation method rely on?

    <p>Antigen-antibody complex binds complement, which is thereafter unavailable for the lysis of hemolysis-sensitized sheep RBC</p> Signup and view all the answers

    Which technique involves the visualization of antibody-aggregated virions using electron microscopy?

    <p>Immunoelectron microscopy</p> Signup and view all the answers

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