Louis was born on December 27 1822, Dole, France.
His parents were Jean-Joseph Pasteur and Jeanne Roqui.
Pasteur attended the École Primaire (primary school), and in 1831 entered the Collège d'Arboix. He was told that he was an average student, who showed some talent as an artist, but he did not enjoy art.
In 1852 Louis became the chairman of the chemistry department at the University of Strasbourg, in Strasbourg, France. In this year he had got married.
In 1865 he lost his father and his two daughters died because of typhoid in 1866.
In July 6 1885 he saved Joseph Meister a nine year old boy’s life that had been bitten by a rabid dog.
He proved that microorganisms cause a disease and he led the way to use vaccines for rabies, anthrax, chicken cholera. He also proved that bacteria sours the taste of beer and wine, then later he discovered that milk was the same, and that bacteria can only be removed by boiling then cooling liquid.
He died in 1895 at Villeneuve.