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infection and response (communicable diseases (viruses (they are tiny,…

- - - - breathed in
      - carried in the air in droplets
    - - touching contaminated surfaces
      - e.g. athletes foot
    - - e.g. cholera
      - drinking or bathing in dirty water
- - - - or by exchanging bodily fluids
      - initially flu like symptoms
      - spread by sexual contact
      - controlled by anti-retrovirus drugs
      - stop virus replicating in body
      - virus attacks immune system
    - - mosaic pattern
      - discolouring
      - effects plants
      - the virus affects growth
      - plant can not then carry out photosynthesis
    - - red skin rash
      - signs of fever
      - spread by droplets
      - serious-even fatal
      - vaccination for it
      - sometimes lead to pneumonia
- - - - thick yellow/green discharge
      - pain on urination
      - sexually transmitted disease
      - treated with antibiotics
      - though humans are becoming more resistant making it harder
    - - from eating something contaminated
      - poultry vaccinated
      - fever, stomach cramps, vomiting and diarrhoea
      - causes food poisoning
      - caused by toxins bacteria release