| Date | 1882 |
| Author | Thomas |
| Contribution | Reported Fasciola in snail intermediate host (Lymnaea truncatula). |
| Reference | Foster |
| Notes | In this classic work, A. P. Thomas (a young and inexperienced worker) was scooped by the eminent Leuckart, whose paper appeared only 10 days before that of Thomas. Both workers were acting on the basis of various observations by other workers suggesting the likelihood of a molluscan intermediate host. |
| Category | Causation |
| Pathogen Class | Helminths |
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