Who helped to achieve aseptic surgery after Lister's use of carbolic acid?

• A. Louis Pasteur
• B. Robert Koch
• C. Ignaz Semmelweis
• D. Joseph Lister

Answer: (B)

The idea being tested is how a scientific understanding of germs moved aseptic surgery from a good idea to a reliable practice. Lister showed that using carbolic acid to antiseptize wounds could cut infections, but the larger leap came from identifying what exactly was causing those infections and how to detect and study them. Robert Koch advanced this by proving that specific bacteria cause specific diseases and by developing reliable methods to culture and study these organisms. That concrete link between microbes and illness gave surgeons a solid target for preventing infection and informed more rigorous sterilization and aseptic techniques in the operating room. Pasteur’s germ theory and Semmelweis’ handwashing were foundational, but Koch’s work provided the practical, pathogen-focused knowledge that pushed aseptic surgery forward after Lister.