Fig. 1-13 Louis Pasteur--Father of Microbiology. Louis Pasteur(1822-1895)began as a chemist but soon became a pi oneer microbiologist. Pasteurs work encompassed pure re search and many areas of applied science that produced several important practical discoveries. Among his many accomplish ments, Pasteur discredited the theory of spontaneous genera tion, introduced vaccination to treat rabies, and solved industrial problems related to the production and spoilage of foods