Louis Pasteur

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Louis Pasteur
Joseph Lister
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Who are these men?
What did they do?
When did they live?
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Louis Pasteur

• Louis Pasteur was a chemist responsible for the
  germ theory of disease the idea that
• most infectious diseases are caused by germs
• He determined that microorganisms called germs
  caused diseases
• Louis Pasteur lived from 1822-1895 and made one
  of the most important developments in medical
  history

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Young Pasteur
Old Pasteur
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Joseph Lister1827-1912

• Responsible for the birth of modern surgery
• Joseph Lister determined that infection rates
  could be decreased by HANDWASHING!
• Introduced the use of antiseptic methods to the
  operating room, saving countless lives

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microorganisms

• An organism of microscopic size

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Microorganisms in soil structure
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microbes

• A microorganism or germ

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SOOOOOOOO, Be careful when putting your
fingers in your mouth You never know what you
are going to get!