| Date | 1889 |
| Author | Charrin |
| Contribution | With Roger, reported first evidence of specific antibacterial substance in serum of immune animals. |
| Reference | Anon. |
| Notes | Immune serum caused Pseudomonas pyocyanea to clump and fall to bottom of culture, whereas normal serum did not. See 1890. |
| Category | Immunology |
| Pathogen Class | Bacteria |
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