ContributionReported improved stain for bacteria.
ReferenceBrock (1961)
NotesApplication of Ehrlich's gentian violet (aniline dye) was followed by iodine-potassium-iodide and then decolorized with alcohol. Some types of bacteria were not decolorized and were therefore easy to see in tissue section. Such bacteria became known as Gram-positive. While initially a disappointment because it did not stain all bacteria, the method later became an important method for differentiating bacterial types. English translation in Brock 1961.
Pathogen ClassBacteria

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