| Date | 1881 |
| Author | Bechamp |
| Contribution | Started publishing concept of microzymas. |
| Reference | Anon. |
| Notes | These were subcellular granules, that, when vitiated, cause disease. Claims were later made that he contributed significantly to the germ theory, but they have been widely rejected. |
| Category | Causation |
| Pathogen Class | General |
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