MICROBIOLOGY LEC. (Historical facts)

Anton Van Leeuwenhoek

• Father of bacteriology

• First described bacteria in 1677 with the use of a simple microscope utilizing crude lenses

• Described 3 Major forms of bacteria

  • Fungi

  • Protozoa

  • Spermatozoa

• In 1674, he observed Protozoa for the first time (ANIMALCULES)

  • Isolated from rainwater, pond, well, water, human mouth, and intestines

1677

When did Anton Van Leeuwenhoek first describe bacteria with the use of a simple microscope utilizing crude lenses

1674

When was a protozoa first observed

• Fungi

• Protozoa

• Spermatozoa

These are the # Major forms of bacteria

Robert Hooke

• Developed the compound microscope in 1678 and continued Leeuwenhoek’s discoveries

• An english scientist

• Was the first person to use the term cells in 1665 and describe the small chambers within the cork that he observed under a microscope of his own design

• He isolated a mold of the surface of the leather and looked under the microscope of his own design (Blue mold)

1665

When was the term “cells” first discovered

Spontaneous Generation Theory (Abiogenesis)

• Life from non-life (3.5 years ago)

• Evolutionary theory which was given much credit when Stanley Miller conducted his famous experiment trying to prove the inorganic beginning of life

• Life could develop spontaneously from decomposing, non-living material

• REFUTED by Francesco Redi demonstrated appearance of maggots in decomposing meat depended on the deposition of eggs by flies

• Pasteur and Tyndall finally disproved the theory of spontaneous generation and proved that life must arise from pre-existing life

Francesco Redi

Who refuted the Spontaneous Generation Theory?

By demonstrating that maggots did not arise spontaneously from decaying meat but rather developed from the eggs of flies

How did Francesco Redi refute the idea of Spontaneous Generation theory?

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