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  • Created by: Angelique
  • Created on: 19-12-12 09:06


steps needed for a pathogen to to cause disease:

  • pathogen must be transmitted.
  • gain entery into the body.
  • evade the defences.
  • harm the host.

how pathogens harm the host:

  • reproduce inside the host, killing the cell.
  • produce toxins.

the non-specific immune system:

  • non-specific methods of destroying foreign bodies. (inflammation and phagocytosis)


  • digestion of microbes by phagocytes (large white blood cells).
  • surround and engulf it, microbe is now trapped in a phagosome.
  • phagosome fuses with lysosomes, killing it.
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