| Date | 1894 |
| Author | Gruber |
| Contribution | Observed, according to his own later account, the agglutination of cholera germs by antiserum. |
| Reference | Lechevalier |
| Notes | Max von Gruber. His pupil Durham pursued the matter; see 1897. |
| Category | Immunology |
| Pathogen Class | Bacteria |
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