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Questions and Answers
Which method demonstrates the presence of the virus directly in tissues, secretions, or excretions?
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?
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?
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?
What does the complement fixation method rely on?
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Which technique involves the visualization of antibody-aggregated virions using electron microscopy?
Which technique involves the visualization of antibody-aggregated virions using electron microscopy?
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