| Date | 1875 |
| Author | O'Neill |
| Contribution | Reported microfilariae (of Onchocerca) in human skin. |
| Reference | Grove |
| Notes | Considered it the cause of the West African skin disease "craw-craw." Equivalent to onchocerciasis. |
| Category | Causation |
| Pathogen Class | Helminths |
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