Innate Immunity

• • Not specific
  • First line of defense
• • Host defense mechanisms that act from the start of an infection BUT do not adapt to a particular pathogen
  • no memory, cannot recognize
• Physical barriers: Skin, Mucus membrane

  Biochemical factors: Complement, Acute phase proteins, Lysozyme

  Chemical barriers: Acid in stomach, Mucus in saliva

  Cellular factors: Phagocytes, NK cells