| Date | 1871 |
| Author | Weigert |
| Contribution | Stained bacteria with carmine. |
| Reference | Garrison |
| Notes | Garrison says Carl Weigert was first to stain bacteria. In any case, staining became of immense important in the validation of the germ theory. Weigert employed aniline dyes four years later. |
| Category | Miscellany |
| Pathogen Class | Bacteria |
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