How disease spreads

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COMMUNICABLE DISEASES ARE CAUSED BY PATHOGENS

COMMUNICABLE DISEASES ARE TRANSMITTED IN DIFFERENT WAYS

pathogens infect both animals and plants and spread in different ways 

  • WATER-some pathogenscan be picked up by drinking or bathing in dirty water.e.g. cholera. It spreads when drinkin water is comtaminated with the diarrhoea of other sufferers.
  • AIR-some pathogens are carried in air e.g. hymenoscypus fraxineus, it is transmitted from infected plants, through the air by the wind.                                                              

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