The History of Microbiology What is microbiology and how has this science come to be a specialized part of biology? •Microbiology as a Science • Organisms of study: bacteria, fungi, protozoans, algae, helminths, viruses •The Discovery of Cells • Anton Leeuwenhoek and Robert Hooke • The Cell Theory •Schleiden, Schwann and Virchow •The Debate over Spontaneous Generation • Francesco Redi and rotten meat (1668) • Lazarro Spallazani and chicken broth (1765) • Pasteur and swan-necked flasks (1861) • Tyndall and Sterility •The Golden Age of Microbiology (1857-1914) • Fermentation and Pasteurization • Germ Theory of Disease (Koch) • Vaccines (Edward Jenner) •Developments in the 20th Century •Salvarsan for syphilis, sulfa drugs •Antibiotics (penicillin in 1928 by Fleming) •Discovery of viruses •Molecular biology and DNA technology • Microbes in the Environment; Bioremediation •Sub-disciplines of microbiology The study of microbiology came into being with the discovery of cells and disproving spontaneous generation.
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The History of MicrobiologyWhat is microbiology and how has this science come to be a specialized part of biology?
•Microbiology as a Science• Organisms of study: bacteria, fungi, protozoans, algae, helminths, viruses
•The Discovery of Cells• Anton Leeuwenhoek and Robert Hooke• The Cell Theory
•Schleiden, Schwann and Virchow•The Debate over Spontaneous Generation
• Francesco Redi and rotten meat (1668)• Lazarro Spallazani and chicken broth (1765)• Pasteur and swan-necked flasks (1861)• Tyndall and Sterility
•The Golden Age of Microbiology (1857-1914)• Fermentation and Pasteurization• Germ Theory of Disease (Koch)• Vaccines (Edward Jenner)
•Developments in the 20th Century•Salvarsan for syphilis, sulfa drugs•Antibiotics (penicillin in 1928 by Fleming)•Discovery of viruses•Molecular biology and DNA technology• Microbes in the Environment; Bioremediation•Sub-disciplines of microbiology
The study of microbiology came into being with the discovery of cells and disproving spontaneous generation.
Pasteur disproves spontaneous generation conclusively in 1861
Pasteur’s Swan-necked flask experiment
Tyndall (1820-1893) Showed That Some Infusions Had to Be Boiled Longer than in
Pasteur’s Experiments
Tyndall’s apparatus showing that air withoutdust grows no microbes.
Cell TheoryDeveloped by Virchow, Schleiden, Schwann and Pasteur
1. All living things are made of one or more cells
2. All existing cells arise from pre-existing cells (biogenesis)
Semmelweis introduces hand-washing to reduce puerperal fever in 1840
Pasteur describes fermentation and invents pasteurization in 1864
Lister uses phenol as an antiseptic to control infections in 1860
Germs Cause Disease: Koch’s Postulates to prove causation
Jenner demonstrates effectiveness of vaccination with cowpox in 1796
Paul Ehrlich discovers first chemotherapeutic agent (salvarsan) in 1910
Alexander Fleming discovers first antibiotic in 1928
James Watson and Francis Crick work out DNA structure in 1952
DNA technology: food, medicines, environmental cleanup
Microbial EcologyHow do microbes grow in nature? How does this information pertain to
controlling or fostering growth?
Biofilm growing on a medical implant
BioremediationHow can we utilize the abilities of microbes in cleaning up
our messes?
Modern Branches of Microbiology
Bacteriology Bacteria
ImmunologyResistance to disease
Virology Viruses
MycologyFungal diseases
ParasitologyProtozoans & animal parasitic worms
EpidemiologyDisease transmission
Rabies virus
Trypanosoma
Staph. aureus
AspergillisEbola Virus
Macrophage
The History of MicrobiologyWhat is microbiology and how has this science come to be a specialized part of biology?
•Microbiology as a Science• Organisms of study: bacteria, fungi, protozoans, algae, helminths, viruses
•The Discovery of Cells• Anton Leeuwenhoek and Robert Hooke• The Cell Theory
•Schleiden, Schwann and Virchow•The Debate over Spontaneous Generation
• Francesco Redi and rotten meat (1668)• Lazarro Spallazani and chicken broth (1765)• Pasteur and swan-necked flasks (1861)• Tyndall and Sterility
•The Golden Age of Microbiology (1857-1914)• Fermentation and Pasteurization• Germ Theory of Disease (Koch)• Vaccines (Edward Jenner)
•Developments in the 20th Century•Salvarsan for syphilis, sulfa drugs•Antibiotics (penicillin in 1928 by Fleming)•Discovery of viruses•Molecular biology and DNA technology• Microbes in the Environment; Bioremediation•Sub-disciplines of microbiology
The study of microbiology came into being with the discovery of cells and disproving spontaneous generation.