| Date | 1881 |
| Author | Ogston |
| Contribution | Reported cluster-forming germ as agent of septic abscess. |
| Reference | Garrison |
| Notes | Used passage in eggs and animal infection to build strong case for causation. Named the organism in the following year; see 1882. This work was done prior to the introduction of solid media. |
| Category | Causation |
| Pathogen Class | Bacteria |
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