| Date | 1823 |
| Author | Magendie |
| Contribution | Reported lethal effect of putrid blood when given intravenously but not orally. |
| Reference | Anon. |
| Notes | Reduced effect if putrid fluid put through filter paper: lack of effect when animals suspended over putrid material to expose them to putative effluvium or miasma. |
| Category | Causation |
| Pathogen Class | General |
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