disease

Cards (13)

  • communicable disease
    can be passed on from person to person
  • non-communicable disease

    cant be passed on ( except through DNA )
  • ways of transmission
    • coughing
    • sneezing
    • contaminated food/water
    • wounds
    • sexual intercourse
  • communicable diseases
    • chicken pox
    • flu
    • athletes foot
    • malaria
  • non-communicable diseases
    • type 2 diabetes
    • cystic fibrosis
    • cancer
    • heart disease
  • 4 types of pathogens
    • fungi - athletes foot
    • bacteria - tuberculosis
    • virus - flu
    • protists - malaria
  • pathogen
    anything that causes disease
  • transmission of pathogens
    • contaminated water - cholera
    • sneezing - tuberculosis
    • contaminated needles - hiv
    • vectors (organisms that carry disease) - malaria
    • contaminated food - salmonella
    • direct contact - athletes foot
  • physical barriers
    • skin
    • stomach acid
    • scabs
  • chemical barriers
    • tears and saliva contain enzymes that kill bacteria
    • mucus
  • how vaccines work
    • vaccine enters the body
    • white blood cells produce antibodies to attack the microbe
    • microbe becomes harmless and is destroyed quickly
    • memory cells protect the body and destroy the microbe if it ever comes back again
  • issues with vaccines
    • some people are allergic
    • they are expensive
    • they use animal testing
  • antigens
    allow the immune system to recognise foreign cells