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Updated: May 23 2017

Antigen-Antibody Interactions

Images
https://upload.medbullets.com/topic/105054/images/precipitin reaction.jpg
  • Introduction
    • Antibodies and antigens interact in order to
      • trap the offending microbe
      • generate an immune reponse in secondary lymphoid organs
    • Kinetics of antigen-antibody interaction
      • antigen excess
        • seen in the start of the infection due to
          • pathogen proliferation
          • antibody production has not yet started
      • equivalence
        • antibody production has become adequate and thus
          • free antibody or antigen cannot be detected
        • this corresponds to the window period for heptitis B antigen serologic studies
      • antibody excess
        • the infection has resolved and thus
          • there is more antibody than antigen
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