Wright's stain is a histologic stain that facilitates the differentiation of blood cell types. It is used primarily to stain peripheral blood smears and bone marrow aspirates which are examined under a light microscope. In cytogenetics it is used to stain chromosomes to facilitate diagnosis of syndromes and diseases.
It is named for James Homer Wright, who devised the stain, a modification of the Romanowsky stain, in 1902. Because it distinguishes easily between blood cells, it became widely used for performing differential white blood cell counts, which are routinely ordered when infections are suspected.
There are related stains known as the buffered Wright stain, the Wright-Giemsa stain, and the buffered Wright-Giemsa stain, and specific instructions depend on the solutions being used, which may include Eosin Y, Azure B, and Methylene Blue (some commercial preparations combine solutions to simplify staining). The May-Grünwald stain, which produces a more intense coloration, also takes a longer time to perform.
White blood cells stained with Wright's stain:
Famous quotes containing the words wright and/or stain:
“The physician can bury his mistakes, but the architect can only advise his clients to plant vines.”
—Frank Lloyd Wright (1869–1959)
“Then suddenly the noon turns afternoon
And afternoon like an ill-written page
Will fade, until the very stain of light
Gathers in all the venom of the night
The equilibrium of the thirtieth age.”
—Allen Tate (1899–1979)