| Date | 1859 |
| Author | Homan |
| Contribution | With Hartwig, traced transmission of dysentery. |
| Reference | Kobro |
| Notes | By means of field studies in Norway, they traced an outbreak to one sailor who had acquired the disease in India. Epidemiological evidence of infectious nature. See Kobro, I, Annals of Medical History 7:395, 1923 (cited in unpublished essay by P. F. Mange). |
| Category | Causation |
| Pathogen Class | General |
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