Final answer:
Robert Koch's work is considered the beginning of experimental microbiology.
Step-by-step explanation:
The scientist whose work is considered the beginning of experimental microbiology is Robert Koch. Koch is known for developing the techniques and criteria to prove that specific microbes cause specific diseases. His work, particularly on anthrax and tuberculosis, laid the foundation for the field of medical microbiology.
Learn more about Robert Koch's contribution to experimental microbiology