| Date | 1800 |
| Author | Orth |
| Contribution | Proposed, in about this year, the contagiousness of puerperal fever. |
| Reference | Carter |
| Notes | Date is provisional and entirely arbitrary. Not in Garrison 4th ed. K. C. Carter, in book review (Bull. Hist. Med. 70: 1996) says Johannes Orth was among those who did "seminal" studies on childbed fever (and guided Pasteur and Koch). |
| Category | Causation |
| Pathogen Class | Bacteria |
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