Louis Pasteur
Louis Pasteur was a French biologist, microbiologist, and chemist who is regarded as one of the founders of microbiology. His discoveries advanced the understanding of disease and led to the development of vaccines and of pasteurisation.
Early Life and Education
Pasteur was born in 1822 in Dole, France, the son of a tanner. He studied at the École Normale Supérieure in Paris and took a doctorate in chemistry.
He taught at several universities and became a professor of chemistry at Strasbourg and at Lille. He was a brilliant experimentalist.
He began his research on the relation between crystals and the polarisation of light. The work established his reputation as a chemist.
The Germ Theory
Pasteur investigated fermentation and showed that it was caused by microorganisms. His findings challenged the theory of spontaneous generation.
He demonstrated that microorganisms are present in the air and that they can be killed by heat. The results supported the germ theory of disease.
The work had practical applications in the production of beer, of wine, and of vinegar. The process of heating liquids to kill bacteria is named pasteurisation in his honour.
The Silkworm and the Diseases of Animals
Pasteur was asked to investigate a disease that was threatening the silk industry. He identified the cause and devised a method of control.
He then studied anthrax, a disease of cattle, and identified the bacterium that causes it. He developed a vaccine by using attenuated bacteria.
He also developed a vaccine against chicken cholera. The discovery of vaccination by attenuation was a major advance.
The Rabies Vaccine
Pasteur developed a vaccine against rabies by passing the virus through animals. The vaccine was tested on animals and then on a human patient.
He treated the boy Joseph Meister, who had been bitten by a rabid dog. The treatment was successful, and Pasteur became a national hero.
The success of the vaccine made him famous and led to the creation of the Pasteur Institute. The institute was founded in 1888 and was dedicated to the study of infectious diseases.
The Pasteur Institute
The institute became a centre for research on microbiology and on immunology. It has produced many important discoveries and has trained generations of scientists.
Pasteur directed the institute until his death. He was succeeded by his colleagues and by his pupils.
The institute has been involved in the fight against infectious diseases throughout the world. The vaccines for diphtheria, tetanus, and tuberculosis were developed there.
The Later Life and Death
Pasteur suffered a stroke in 1868 and was partially paralysed. He continued to work and to direct his research.
He died in 1895 near Paris. He was given a state funeral and was buried in the Pasteur Institute.
His name is commemorated in the Pasteur Institute, in pasteurisation, and in many scientific institutions. He is regarded as one of the greatest scientists of all time.
Legacy
Pasteur is one of the founders of microbiology and of immunology. His work transformed medicine and public health.
His discoveries saved countless lives and improved the production of food. The germ theory of disease is a foundation of modern medicine.
He is remembered for his experimental rigour and for his practical application. His work continues to influence the life sciences.
The Crystallography
Pasteur began his career with the study of crystals. He found that certain crystals have an asymmetric structure.
He separated the two forms of tartaric acid by hand. The work established the relation between the structure and the optical activity.
The discovery was a foundation of stereochemistry. It led to the study of the structure of molecules.
The Fermentation Studies
Pasteur investigated the fermentation of beer and of wine. He showed that the process was caused by microorganisms.
He demonstrated that the microorganisms could be killed by heating. The process of pasteurisation was named in his honour.
The work had important applications in the food industry. It contributed to the understanding of the role of microbes in disease.
The Anthrax and Rabies Vaccines
Pasteur developed a vaccine against anthrax by attenuating the bacteria. The vaccine was tested on sheep at Pouilly-le-Fort.
He developed a vaccine against rabies by passing the virus through rabbits. The vaccine was tested on the boy Joseph Meister.
The success of the vaccines established the principle of immunisation. The work led to the creation of the Pasteur Institute.
See also
- Germ theory
- Pasteurisation
References
- ↑ Debré, Patrice. Louis Pasteur. Baltimore: Johns Hopkins University Press, 1998.
- ↑ Pasteur, Louis. Études sur la bière. Paris: Gauthier-Villars, 1876.
- ↑ Dubos, René. Louis Pasteur: Free Lance of Science. Boston: Little, Brown, 1950.
- ↑ Geison, Gerald. The Private Science of Louis Pasteur. Princeton: Princeton University Press, 1995.