Historical timeline of Microbiology

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Historical timeline of Microbiology

1953

Identified physical structures of DNA

Roasalind Franklin

James Watson and Francis Crick

Proposed a model for the structure and replication of DNA.

1950's

Transposons- are tiny segments of DNA that can move from one region of DNA molecule to another

A geneticist who discovered transposms in corn.

Barbara McClintock

1940's

George W. Beadle and Edward I. Tatum

demonstrated the relationship between genes and enzymes

Main topic

1928

Accidently discovered penicillin, first antibiotic discovered

Alexander Fleming

1910

Paul Ehrlich

Discovered first treatment for syphilis

1884

Discovered Phagocytosis. Observed cells collected around a splinter inserted in a sea star embryo

Elie Metchnikoff

1876

Discovered Anthrax -Bacillus anthracis(not the band)

1864

Created pasteurization

Demonstrated that microbes in the air could contaminate sterile solutions, but the air itself can not create microbes. Showed microbes could be present in non living matter and could be killed by heat.

Louis Pasteur

1847

Ignaz Semmelweis

Proved that microorganisms causes surgical would infection

1843-1910

4.The pathogen must be isolated from the inoculated animal and must be shown to the original organism.

3. The pathogen from the pure culture must cause the disease when it's inoculated into a healthy, susceptible laboratory animal.

2. The pathogen must be isolated from the diseased host and grown in pure culture.

1. The same pathogen must be present in every case of the the disease.

Koch's Postulates.

Robert Koch

1827-1912

Joseph Lister

Treated surgical wounds with phenol which killed bacteria, decreased infection and death in patients. Responsible for aseptic techniques. (Listerine)

1796

Created the first vaccine for small pox. Inoculated people with a similar virus – cow pox.

Edward Jenner

1753

Carl Linneaus

Developed the binomial nomenclature that we use today.

1673-1723

first person to observe living organisms under a microscope he called them Animalcule (microorganism)

Anton Van Leeuwenhoek

1668

Francisco Redi

Did not believe in spontaneous generation, he experimented with meat in jars to prove maggots did not arrive spontaneously

1665

Looked at a cork under a microscope and saw boxes which he called cells.

Robert Hook- Cell Theory