In 1854 Pasteur concentrated on the fermentation process. Other famous chemists believed that the fermentation was a chemical process. Louis denied it. He came to conclusion that it was a biological process, during which yeast was reproduced. Louis published his conclusion in his book in 1857.
Louis explained the causes of spoilage of wine turns into a vinegar or bitter. He proved that this process was the result of bacterial decomposition. He wanted to remedy this by adding variety of forms to the wine. He discovered a better way to do this. Since then, the process is called pasteurization.
In 1880 Louis managed to isolate the microbes that cause cholera in poultry . It was the first attempt to induce immune reaction. He wanted to manufacture the vaccine. Pasteur state birds of a culture of cholera bacteria. He concluded that the birds did not fall ill. Then, he carried out a further experiment, which showed that the activity of cholera germs were weakened with the progress of time. Pasteur discovered the general principle of the acquisition of resistance by organisms. To produce vaccines against cholera
Then, the vaccine against rabies was developed. Up to that time, the disease was considered to be terrible and almost incurable. Pasteur immunized his dogs after implantation of the weakened bacteria. Vaccine against rabies
In 1885 a small boy, who had been attacked by the dog affected with rabies, was brought to Pasteur. The scientist decided to use the vaccine. Pasteur saved the boy and covered himself with honour.
Unusual act ...
He died in St. Cloud on 28th September 1895. He was buried in the Cathedral of Notre-Dame in Paris. Currently, the remains of Louis Pasteur are stored in the crypt in the Pasteur Institute of Paris.