Staining

thumb|Histologic specimen being placed on the stage of an optical microscope right|300px|thumb|Human lung tissue stained with [[hematoxylin and eosin as seen under a microscope]]

group of bacteria that do not retain the Gram stain used in bacterial differentiation

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 cell wall

thumb|230px|Main staining patterns on chromogenic immunohistochemistry. thumb|right|Immunofluorescence of human skin using an anti-IgA antibody. The skin is from a patient with [[Henoch–Schönlein purpura: IgA deposits are found in the walls of small superficial capillaries (yellow arrows). The pale wavy green area on top is the epidermis, the bottom fibrous area is the dermis.]] thumb|"Block" staining: strong nuclear and cytoplasmic expression in a continuous segment of cells. Immunohistochemistry is a form of immunostaining. It involves the process of selectively identifying antigens in cells

right|thumb|300px|A stained histological specimen, sandwiched between a glass [[microscope slide.]]

thumb|right|320px|Mycobacterium tuberculosis (stained red) in tissue (blue).

genetic technique

silver staining technique for visualizing nervous tissue under light microscopy

cellular object readily stainable with a Romanowsky stain.

stain that can be applied on living cells without killing them

thumb|Immunocytochemistry labels individual proteins within cells, such as Tyrosine hydroxylase|TH (green) in the [[axons of sympathetic autonomic neurons.]]

thumb|right|200px|Gram-positive anthrax bacteria with counterstained white blood cells A counterstain is a stain with colour contrasting to the principal stain, making the stained structure easily visible using a microscope.

family of related stains for examination of blood including the detection of parasites

particular staining pattern of cells and tissues when using haematoxylin and eosin stains

technique of washing tissue specimens with a concentrated solution of a heavy metal salt and letting it dry