| Date | 1859 |
| Author | Virchow |
| Contribution | Infected dog with Trichinella and discovered the adult worm in small intestine. |
| Reference | Grove |
| Notes | See Campbell, W. C., Trichinella and Trichinosis, Plenum, 1983. |
| Category | Causation |
| Pathogen Class | Helminths |
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