Microbes and disease
microorganisms <ul><li>Pathogens (cause disease) </li></ul><ul><li>Microscopic </li></ul><ul><ul><li>Bacteria   (cause cho...
Important scientists in this area <ul><li>Ignaz Semmelweiss  – noticed that when doctors washed their hands fewer women di...
Cleaning chemicals <ul><li>Disinfectants - for surfaces </li></ul><ul><li>Antiseptics - for wounds/sores </li></ul><ul><li...
Protection against disease <ul><li>Skin  - barrier </li></ul><ul><li>Blood clots  and  scabs </li></ul><ul><li>Tears </li>...
homework <ul><li>Read p38-9 about drug development </li></ul><ul><li>Find out about the drug trials that went wrong at nor...
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microbes and disease

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microbes and disease

  1. 1. Microbes and disease
  2. 2. microorganisms <ul><li>Pathogens (cause disease) </li></ul><ul><li>Microscopic </li></ul><ul><ul><li>Bacteria (cause cholera, boils, MRSA,TB,typhoid) </li></ul></ul><ul><ul><li>Viruses (cause warts,polio,flu,mumps,measles) </li></ul></ul><ul><ul><li>Fungi (cause athletes foot, ringworm) </li></ul></ul><ul><li>Parasites also cause disease but these are not microorganisms ( eg fleas, worms) </li></ul>
  3. 3. Important scientists in this area <ul><li>Ignaz Semmelweiss – noticed that when doctors washed their hands fewer women died giving birth </li></ul><ul><li>Louis Pasteur – proved germs in air caused disease </li></ul><ul><li>Joseph Lister – developed carbolic soap and ensured surgeons and their instruments were cleaned before operations </li></ul>
  4. 4. Cleaning chemicals <ul><li>Disinfectants - for surfaces </li></ul><ul><li>Antiseptics - for wounds/sores </li></ul><ul><li>Why cleaning is important – good hygiene removes dirt/grease that pathogens stick to and use as a source of energy to multiply </li></ul>
  5. 5. Protection against disease <ul><li>Skin - barrier </li></ul><ul><li>Blood clots and scabs </li></ul><ul><li>Tears </li></ul><ul><li>Hairs in nose filter dirt </li></ul><ul><li>Mucus in nose and bronchi sticks to dirt/dust </li></ul><ul><li>Acid in stomach kills microbes </li></ul><ul><li>White blood cells – ingest microbes/make antibodies </li></ul><ul><li>Vaccination – with weak/dead microbe to make antibodies </li></ul><ul><li>Antibiotics – drugs to kill bacteria </li></ul>
  6. 6. homework <ul><li>Read p38-9 about drug development </li></ul><ul><li>Find out about the drug trials that went wrong at northwick park hospital in North London </li></ul><ul><li>Revise the whole topic ( first chapter in your text book) </li></ul><ul><li>Practise tests next week </li></ul>
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