Who is considered the father of microbiology who first described microorganisms as animalcules?

• A. Robert Hooke
• B. Antonie van Leeuwenhoek
• C. Robert Koch
• D. Carl von Linne (Linnaeus)

Answer: (B)

Antoni van Leeuwenhoek is recognized as the father of microbiology because he was the first to observe and describe microorganisms, calling them animalcules. Using his enhanced single‑lens microscopes, he reported bacteria, protozoa, and other tiny life forms from sources like pond water and dental plaque, and he shared these findings with the Royal Society in the 1670s. This direct observation of microscopic life established that there is a whole world of living beings invisible to the naked eye and set the foundation for microbiology as a science. While Hooke described cells and Linnaeus developed taxonomy, van Leeuwenhoek’s pioneering descriptions of microorganisms mark the crucial starting point.