2. Notable Names
• Antony Van Leeuwenhoek
• Louis Pasteur
• Robert Koch
• Theobald Smith
• Walter Reed
• Paul Ehrlich
• Elie Metchnikoff
• August Von Wassermann
3. The Mircrobes
• Roger Bacon(1220-1292) postulated disease is
caused by invisible living creatures.
Girolana fracastoro of Verona(1483-1553) and Anton Von Plenciz (1762) supported
• Athanasius Kircher(1601-1680) suggested disease
is caused by tiny invisible worms.
• Robert Hooke in 1665 gave description of cell,
quoting Aristotle.
Animals and plants, complex as they ay appear, are yet
composed of few elementary parts frequently repeated
4. The Miroscope
• Anthony Van leeuwenhoek
Father of Microscope, made microscope in home at Delft, Holland
• Wrote series of letters to British Royal society
describing “very little animalcules” he observed
using his new device.
• In his letters, he describes
the living creatures he had
seen in rain water, thousands
time magnified.
5. The Germ Theory Of Disease
•Pasteur demonstrate bacteria might cause some diseases
•Fracastoro of Verona suggested that diseases transmit by means of
invisible organism from one being to another.
•Plenciz in 1762, suspected different germs were responsible for
different disease.
•Jonathan swift wrote this as concept of parasitism were quite
general.
So naturalists observe, a flea
Hath smaller fleas that on him prey;
Ad these have smaller fleas to bit ‘em.
And so proceed ad infintum
