The document provides an overview of the history of microbiology from its early beginnings to modern developments. It discusses key figures like van Leeuwenhoek who first observed microbes under microscopes and Pasteur and Koch who experimentally disproved spontaneous generation and established germ theory of disease. Major developments included classification of microbes, understanding fermentation and disease causation, and advances in preventing infection. Modern microbiology focuses on genetics, molecular biology, biochemistry, bioremediation, and using microbes to develop medicines and manipulate genes.