| Date | 1869 |
| Author | Drognat-Landre |
| Contribution | Published non-microbiological evidence for infectious nature of leprosy. |
| Reference | Harboe |
| Notes | This conclusion was based on study of lepers in Dutch Guiana. See Harboe, M., Int. J. Leprosy 41:417-421, 1973 (cited in unpublished essay by P. F. Mange). See 1874 Hansen. |
| Category | Causation |
| Pathogen Class | Bacteria |
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