Lecture 2 History Of Microbiology Flashcards
Supporters of Theory of Spontaneous Generation
(Autogenetic theory or Abiogenesis
Aristotle,
Needham and the Ancient
Greeks
A theory where the Living organisms could
develop from nonliving
matter.
Theory of Spontaneous Generation
(Autogenetic theory or Abiogenesis
A theory where the alternative hypothesis that
living organisms can arise only
from pre-existing life forms?
Biogenesis or biogenetic
theory
Supporters of Biogenesis or biogenetic
theory?
Francesco Redi,
Spallanzani, Jablot, Louis
Pasteur, Robert Koch
A scientist (Pro Biogenesis) scientist who
challenged the idea that
maggots arise from rotten
meat?
Francisco Redi (1668)
A (Pro Abiogenesis) who boiled nutrient broth into covered flasks?
1745 -John Needham
He divided a hay infusion that had been boiled into two containers: a heated container that was closed to the air and a heated container that was freely open to the air. Only the open vessel developed microorganisms. This further helped to disprove abiogenesis.
Louis Jablot
A (Pro-
Biogenesis) who boiled nutrient solutions in
flasks.
Simulated previous experiment but
boiled the broth longer.
1765: Lazzaro Spallanzani
He put an end to abiogenesis debate with his swan-neck or goose-
neck flask
Louis Pasteur (1822-1895)
• Finally put an end to abiogenesis
• Showed microbes caused
fermentation
• Studied spoilage and
introduced “Pasteurization” to
prevent it from contamination
•Used cotton plugs in his
cultures to prevent air borne
contamination
• Devised Aseptic Technique.
Louis Pasteur
“
Father of Microbiology”
Louis Pasteur (1822-1895)
-They discovered the 1st compound microscope (circa 1595)?
- They • Mounted 2 lenses in
a tube and produced
the first compound
microscope.
Hans Lippershey and Zacharias
Janssen(1590) (Dutch lens
grinders)
-first to observe microbes (protozoa, bacteria, yeast)
using a simple microscope
- reported his “animalcules” to the Royal Society of
London
Antonie van Leeuwenhoek
(draper and harberdasher- 1632-1723)
They Pioneered the developments in microscopy such
as immersion lenses and apochromatic lenses
which reduce chromatic aberration
Carl Zeiss and Ernst Abbe 1883
a process of killing heat
resistant bacterial
endospores?
“tyndallization”