| Date | 1882 |
| Author | Friedlander |
| Contribution | Reported diplococci (pneumococci) in large numbers in lung sections taken at autopsy in cases of pneumonia. |
| Reference | Anon. |
| Notes | Carl Friedlander (a with umlaut). In further work in the following years, his results were clouded by confusion between the diplococcus and a bacillus that was very short and occurred in pairs (later named Klebsiella pneumoniae). Garrison gives 1883. |
| Category | Causation |
| Pathogen Class | Bacteria |
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