1. Disease & Germ Theory

2. Pathogens- a disease causing agent ex- viruses, bacteria, fungus, protist
Diseases caused by viruses:
Chicken pox, measles, rubella, mumps, small pox, polio, hepatitis, AIDS, flu, rabies…

3. Vaccine: a substance prepared from killed or weakened pathogens and injected into body to produce an immune response.
Immune system: Leukocytes white blood cells make antibodies which attack virus infected cells.

5. Edward Jenner: invented first vaccine for small pox; injected himself with cow pox and made himself immune to small pox. (1796)
Jonas Salk: invented vaccine for polio 1950’s
Pasteur: invented vaccine for rabies

6. Germ Theory
Many diseases arise from germs (microorganisms) attacking the body from the outside.
Developed by Louis Pasteur & Robert Koch

7. Pasteur and Redi disproved spontaneous generation
spontaneous generation (abiogensis): Life from non-life

9. Francesco Redi
Also, helped disprove spontaneous generation, by setting up an experiment that showed maggots come from flies

12. As a result of the acceptance of germ theory there have been many changes in health practices.
Aseptic technique- procedures used to prevent contamination from microorganisms.
Joseph Lister- first surgeon to use aseptic technique; 1867

13. Sanitation: prevent microorganisms from entering food and water
Sanitation: prevent microorganisms from entering food and water. Ex-refrigeration, boiling
Antiseptics- kills pathogens on skin ex-hydrogen peroxide
Antibiotics- kills bacteria in body