| Date | 1790 |
| Author | Abildgaard |
| Contribution | Reported tapeworm in ducks ater feeding them the intermediate host (fish) harboring the larval stage. |
| Reference | Grove |
| Notes | Based on observation and deduction. First known attempt to demonstrate parasite transmission. Major discovery but not appreciated in its day. |
| Category | Miscellany |
| Pathogen Class | Helminths |
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