Causes and Treatments

Beliefs About Causes and Treatments of Disease

Slide06

LOUIS PASTEUR

  • 1850s French chemist, Louis Pasteur, investigated problem of liquids turning sour in brewing industry
  • Powerful microscopes meant Pasteur could observe the growth of small organisms
  • Discovered heating liquid killed bacteria & stopped liquid going sour
  • 1861 – Pasteur published his germ theory – showed microbes in air caused decay
  • PROVED OLD THEORIES WRONG ONCE AND FOR ALL – no more four humours
  • Led to improved understanding of WHAT caused disease BUT treatments took time because needed to identify microbe responsible for each separate disease
  • Breakthrough in knowledge & understanding but impact slow – some doctors still recommended old ideas such as bloodletting

Slide08

ROBERT KOCH

  • 1875 – Read Pasteur’s work investigated which bacteria were linked to specific diseases
  • Worked with a team of scientists and was funded by the German government
  • 1877 – identified microbes that caused the disease anthrax in sheep
  • 1882 – identified microbes causing TB
  • 1883 – identified microbes causing Cholera
  • Found that chemical dyes could be used to stain specific bacteria so they could be studied more easily under the microscope
  • Used research teams and received govt funding
  • This meant he could afford new technology, large-scale testing, and develop different specialisms e.g. medicine, biology, chemistry

Slide12

 

Here’s the activity we did in class about what influenced both Pasteur and Koch:

Colour code the boxes according to the different factors that influenced them – remember! Alternatively you can just use it for information!

Factors Influencing Pasteur and Koch Tables