Explanation: In 1890, Robert Koch created a series of test to assess the germ theory of disease. In 1676, bacteria was first observed by Anton Van Leeuwenhoek. In 1859, Louis Pasteur disproved spontaneous generation and developed the germ theory of disease. In 1910, Paul Ehrlich created the first synthetic antibiotic.
Robert Koch is the scientist who created tests that helped confirm that bacteria and other microorganisms cause a variety of diseases. He is a German physician and a microbiologist who is known in identifying specific causative agents in a number of illnesses which includes cholera, tuberculosis and anthrax. Due to this contribution to medicine, he received a Nobel Prize in 1905.<span />
