Search results
Results From The WOW.Com Content Network
The motion of air through the tube is slowed and aerosolized bacteria or other particles in the air tend to become trapped by moisture on the tube's inner surfaces. The contents of the flask thus remain free of microbes, a property showcased by French microbiologist Louis Pasteur in nineteenth century experiments used to support germ theory as ...
Pasteur wanted to discover if his work had greater applications than improving alcohol production and diagnosing silkworms. In the 1870s, large numbers of chickens were dying from cholera. When he cultured the bacteria from the chickens, he left these cultures out in the air for long periods of time.
Louis Pasteur FRS Photograph by Nadar, 1895 Born (1822-12-27) 27 December 1822 Dole, France Died 28 September 1895 (1895-09-28) (aged 72) Marnes-la-Coquette, France Education École normale supérieure University of Paris Known for Anthrax vaccine Cholera vaccine Rabies vaccine Chirality Dextran Fermentation theory Galactose Germ theory of disease Kinetic resolution Koch–Pasteur rivalry ...
Louis Pasteur was a pioneer in chemistry, microbiology, immunology and vaccinology. pictore/DigitalVision Vectors via Getty ImagesSome of the greatest scientific discoveries haven’t resulted in ...
A representation by Robert Seymour of the cholera epidemic depicts the spread of the disease in the form of poisonous air.. The miasma theory was the predominant theory of disease transmission before the germ theory took hold towards the end of the 19th century; it is no longer accepted as a correct explanation for disease by the scientific community.
Pasteur's work on fermentation later led to his development of the germ theory of disease, which put the concept of spontaneous generation to rest. [1] Although the fermentation process had been used extensively throughout history prior to the origin of Pasteur's prevailing theories, the underlying biological and chemical processes were not ...
In Pasteur's day, and for many years after his death, the word "virus" was used to describe any cause of infectious disease. Many bacteriologists soon discovered the cause of numerous infections. However, some infections remained, many of them horrendous, for which no bacterial cause could be found.
In Pasteur's laboratory, a culture of Pasteurella multocida was left out over a weekend exposed to air, and Pasteur and Emile Roux noticed upon return to the laboratory that its virulence to chickens was diminished. Pasteur applied the discovery to develop chicken cholera vaccine, introduced in a public experiment, an empirical challenge to the ...