| Date | 1889 |
| Author | Kitasato |
| Contribution | Reported that tetanus is caused by Nicolaier's club-shaped, spore-forming bacillus. |
| Reference | Brock 1999 |
| Notes | Organism is currently called Clostridium tetani. See 1884, 85. He showed that it was an obligate anaerobe, and suspected that it released a toxin. The work was done in Koch's laboratory. |
| Category | Causation |
| Pathogen Class | Bacteria |
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