THE HISTORY OF MICROBIOLOGY begins with Antonie van Leeuwenhoek. This curious man designed and built simple microscopes and opened a whole new world to man. His discoveries went underground for 200 years with a few others revealing more of the unseen world, but with no major advances. Time was waiting. Then the time became ripe in the last half of the 19th century and on the stage stepped two great men, Robert Koch and Louis Pasteur.

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