It is difficult to tell whether an organism is gram-positive or gram-negative using a microscope; Gram staining, created by Hans Christian Gram in 1884, is required. The bacteria are stained with the dyes crystal violet and safranin. Gram positive cells are purple after staining, while Gram negative cells stain pink.
it is difficult to tell whether an organism is gram-positive or gram-negative using a microscope; gram staining created by hans christian gram in 1884 is required the bacteria are stained with the dyes crystal violet and safranin gram positive cells are purple after staining while gram negative cells stain pink