Robert Koch

1843–1910 · Germany · Founder of medical bacteriology.

Contribution

  • Identified causative agents of anthrax, tuberculosis, and cholera.
  • Developed rigorous culture methods and staining approaches.
  • Formulated Koch’s Postulates — criteria linking a microbe to a disease.
  • Solidified Germ Theory with specific etiologic proofs.

Why It Still Matters

Koch’s logic still structures how we think about etiology, culture, and pathogen discovery — even when molecular methods replace pure culture.

Active Recall

  1. Which three major diseases did Koch link to specific bacteria?
  2. State Koch’s Postulates in one sentence each.