Specific immunity

• Specipe (Adoptive) Immunity


  3 major functions
• Recognize non self


  1. Patiens center cells, for in, other potheseny

  2. Body's "own" cells
• Respond to nonself


  1. Errector response

  2. Either eliminates foreign material, or renders harm

  3. Preventing disease
• Remember nonself


  1. Mounts more intense and rapid memory response

  2. Eliminates invader again
• Distinguishing characteristics of Specipe (Adoptive) Immunity

  • Specificity - Immunity directed against particular pathogen
  • Memory - No noticeable response to 2nd exposure so fast
  • Based on interaction with Specific antigens
• Humoral immunity


  Antibody-mediated immunity
• Humoral immunity


  • Based on action of antibodies
  • In body fluids
  • Soluble proteins called antibodies
  • Produced by B lymphocytes
  • Circulating antibodies neutralize or mark foreign protectors like bacteria, toxins, extracellular viruses for destruction
• Cellular (cell-mediated) immunity


  Based on T lymphocytes
• Cellular (cell-mediated) immunity


  • Directly attacks virus, parasite infected cells, transplanted cells or cancer cells
• Acquired immunity


  Immunity that develops after exposure to antigen
• Types of acquired immunity

  • Natural
  • Vaccine
• Transfer of antibodies


  Passive immunity
• Babies are not born with full immunity