Discovery of microorganisms
•Download as PPTX, PDF•
17 likes•9,521 views
This document summarizes the history and key discoveries related to microorganisms. It outlines that in the Discovery Era in the 1st century BC, it was observed that diseases were caused by invisible agents. In the Transition Era, Antony Van Leeuwenhoek used early microscopes to observe "animalcules" in the 1670s and was a pioneer of microbiology. The Golden Era brought major discoveries including Louis Pasteur proving the germ theory of disease and disproving spontaneous generation through experiments with swan-necked flasks in the late 1800s. Robert Koch also developed staining techniques and isolated bacteria that cause anthrax, tuberculosis, and cholera in the late 1800s, advancing the field of bacter
Report
Share
Related slideshows
More Related Content
What's hot
What's hot (20)
Similar to Discovery of microorganisms
Similar to Discovery of microorganisms (20)
Recently uploaded
Recently uploaded (20)
Discovery of microorganisms
- 1. THE DISCOVERY OF MICROORGANISMS Group4: RENITANOVITASARI (1506839) WAFAHANIFAH (1503961) IPSE 2015
- 2. Microorganisms Small Organism Microor ganisms “ A microscopic livingorganism, which may be single celled or multicellular.”
- 3. Timeline Transition Era Aristotle Antonie Van Leeuwenhoek (1632–1723) Francesco Redi (1626-1697) John Needham (1713-1781) Lazzaro Spalanzani (729-1799) Discovery Era Varo & Columella (1st Century BC) : “Diseased caused by invisible” Girolamo Fracastorius of Verona (1546) : “Living germs caused infectious disease” Von Plenciz (1762): “Each disease caused by different agent” Kirch (1659): “Finding worms on patient”
- 4. Timeline Golden Era Louis Pasteur John Tyndall (1820-1893) Lord John Lester (1827-1912) Robert Koch (1893-1910)
- 6. DISCOVERY ERA: “Spontaneous Generation” Aristotle (382-322) and others believed that living organisms could develop from non living materials. In 13th century, Rogen Bacon described that the disease caused by a minute “seed” or “germ”.
- 7. • Varo & Columella (1st Century BC) : “Diseased caused by invisible” • Girolamo Fracastorius of Verona (1546) : “Living germs caused infectious disease” • Von Plenciz (1762): “Each disease caused by different agent” • Kirch (1659): “Finding worms on patient”
- 9. Antony Leeuwenhoek (1632 – 1723) Father of Bacteriology and protozoology In 1676, “Animalcules” “Microbes is used by Sedillot in 1878 Crude Microscope
- 10. • Leeuwenhoek earned his living as a draper, but spent much of his spare time constructing simple microscopes composed of double convex glass lenses held between two silver plates (figure below) • his microscope could magnify around 50 to 300 times,
- 11. • Leeuwenhoek observed a variety of things including rain water, pond water, blood and scrapings from his own teeth using his own microscope • He saw minute moving objects which he called “little animalcules”. • He made accurate sketches and communicated his findings to “Royal society of London”.
- 12. Francesco Redi (1626 – 1697) 1st controlled experiment Addressed that maggots appear on meat after flies have landed There’s no such thing as Spontaneous Generations
- 13. John Needham (1713 – 1781) Animalcules arose spontaneously on mutton gravy Supporter of spontaneous generations Covered the flask with cork as done by Redu. Still the microbes appeared on mutton broth.
- 14. Lazzaro Spalanzani ( 1729 - 1799) Trying to prove spontaneous generations His Book Showed that broiled broth would not give rise to microscopic forms of life
- 16. Transitions Era
- 17. Golden Era
- 18. Louis Pasteur (1822 – 1895) Demonstrated that microorganisms in the air were responsible for food spoilage Construct a swan-necked flask Father of Microbiology Proved “Biogenesis” and disapprove on “Spontaneous Genereations” “Pasteurization”
- 19. Pasteur’sexperiment for the competitioninvolvedhis famous “swan-necked” flasks
- 20. John Tyndall (1820 - 1893) Discovered highly resistant bacterial structure, “Endospore” in air and dust Prolonged boiling or intermittent heating was necessary to kill endospores “Tyndallisation”
- 21. Lord Joseph Lister (1827-1912 Father of Antiseptic Surgery Wound infections were due to microorganisms Use carbolic acid to destroy microorganisms
- 22. Robert Koch (1843 – 1910) Father of Bacteriology Staining Techniques Discover Anthrax bacillus (1876), Tubercle bacillus (1882), and Cholera vibrios (1883) Koch’s Postulate
- 27. THANK YOU