| Date | 1875 |
| Author | Weigert |
| Contribution | Stained bacteria with aniline dye, "methyl violet." |
| Reference | Long |
| Notes | Prompted by work of Ehrlich, 1875.. Collard says that this first synthetic stain for bacteria was methylene blue. The bacteria were stained in suspension and examined in wet preparations; see 1877. |
| Category | Miscellany |
| Pathogen Class | Bacteria |
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