Robert Koch announces the discovery of Mycobacterium tuberculosis, the bacterium responsible for tuberculosis

Robert Koch was a pioneering German physician and microbiologist who played a key role in founding modern bacteriology. He is best known for discovering the causative agents of tuberculosis (Mycobacterium tuberculosis) and cholera (Vibrio cholerae), and for identifying anthrax (Bacillus anthracis) as a bacterial disease. His work established the now-famous Koch’s postulates, a systematic method for linking specific pathogens to specific diseases, which became a foundational principle in medical microbiology. Koch’s meticulous techniques in isolating and cultivating bacteria transformed diagnostic microbiology into a scientific discipline. He received the Nobel Prize in Physiology or Medicine in 1905 for his work on tuberculosis. His legacy still resonates today in public health, infectious disease research, and epidemiology