| Date | 1879 |
| Author | Neisser |
| Contribution | Reported a micro-organism clearly associated with gonorrhea. |
| Reference | Foster |
| Notes | Causation was almost a certainty, but inoculation of animals or humans did not give consistent results. Neisser also saw the organism in eye secretions in cases of opthalmia neonatorum (leading to Crede's method of silver nitrate prophylaxis). |
| Category | Causation |
| Pathogen Class | Bacteria |
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