Understanding Precipitation Serological Tests
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Understanding Precipitation Serological Tests

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Questions and Answers

What is a precipitation serological test?

  • A test that detects viral particles in blood
  • A test where soluble antigen and antibody form a visible precipitate (correct)
  • A test that measures immune cell activity

    • What is the optimal condition for precipitation reactions?

  • Antibody excess
  • Antigen excess
  • Equivalence between antigen and antibody (correct)

    • What are antibodies that cause precipitation called?

  • Immunoglobulins
  • Precipitins (correct)
  • Agglutinins

    • In which zone of the precipitation curve does lattice formation occur?

    <p>Zone of equivalence</p> Signup and view all the answers

    Which method involves placing an antigen sample in a well in agar?

    <p>Radial immunodiffusion</p> Signup and view all the answers

    What forms around the well in radial immunodiffusion?

    <p>precipitin ring</p> Signup and view all the answers

    Which method uses a precipitin ring to determine antigen concentration?

    <p>Radial immunodiffusion</p> Signup and view all the answers

    Which technique measures light scattered by antigen-antibody complexes?

    <p>Nephlometry</p> Signup and view all the answers

    What does turbidimetry measure?

    <p>Light extraction from precipitate</p> Signup and view all the answers

    Which proteins can be measured by nephlometry?

    <p>C3, C4, albumin, immunoglobulins</p> Signup and view all the answers

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