In bacteriology, Gram-positive bacteria are bacteria that give a positive result in the Gram stain test , which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bacterium , any of various types of bacteria that are characterized by having a thick peptidoglycan cell wall and by the absence of an outer membrane composed of lipopolysaccharide. Gram Positive Bacteria – Examples, Benefits, Types Gram-positive bacteria are a category of bacteria that appear violet or blue when stained using the Gram staining technique, a method developed by Hans Christian Gram . This staining response is due to the thick layer of peptidoglycan in their cell walls, which retains the crystal violet stain used during the process. In contrast to Gram -negative bacteria , which have a thinner peptidoglycan layer and an outer membrane, Gram-positive ... Health professionals need to understand the important difference between gram-positive and gram-negative bacteria . Gram-positive bacteria are bacteria classified by the color they turn in the staining method. Hans Christian Gram developed the staining method in 1884. The staining method uses crystal violet dye, which is retained by the thick peptidoglycan cell wall found in gram-positive organisms. This reaction gives gram-positive organisms a blue color when viewed under a microscope ...
