| Date | 1884 |
| Author | Gram |
| Contribution | Reported improved stain for bacteria. |
| Reference | Brock (1961) |
| Notes | Application 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. |
| Category | Miscellany |
| Pathogen Class | Bacteria |
Copyright © 2007- William C. Campbell. All rights reserved.