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a dye in which the cation is the colored component of the dye molecule that binds to anionic groups of nucleic acids (PO4Ξ) or acidic mucopolysaccharides (for example, chondroitin sulfate).
ba·sic stain(bā'sik stān)
A dye in which the cation is the colored component of the dye molecule that binds to anionic groups of nucleic acids (PO4≡) or acidic mucopolysaccharides.
A chemical used to add pigment to the nuclear or acidic components of cells.
See also: stain
1. a substance used to impart color to tissues or cells, to facilitate microscopic study and identification.
2. an area of discoloration of the skin.
a stain in which the coloring agent is in the acid radical.
a stain in which the coloring agent is in the basic radical.
carbol fuschin stain
used to stain some gram-negative bacteria, including Campylobacter fetus.
a technique for demonstrating chlamydial elementary bodies, using formol blue and safranine.
one containing methylene blue, maltose and azure II, used for staining mycoplasmal microcolonies.
one which facilitates differentiation of various elements in a specimen.
hematoxylin and eosin stain
a staining method employed universally for routine histological examination of tissue sections.
India ink stain
used to demonstrate capsules on Cryptococcus neoformans and some bacterial species.
staining of the breech and back of the udder of a ewe caused by the passage of the fetal fluids and then the lochia. Used as a guide to whether or not the ewe has lambed and perhaps lost her lamb.
a basic fuscin solution for staining chlamydial elementary bodies.
one that produces in certain elements color different from that of the stain itself.
methanamine silver stain
stains fungal elements in tissue a dark brown.
new methylene blue stain
a metachromatic dye used for staining blood, vaginal smears, and tissue samples for cytological examination. Particularly useful in demonstrating reticulocytes.
used on smears of milk for demonstrating organisms in mastitis.
an aniline dye used in wet mounts to demonstrate capsules, especially with cryptococcusneoformans.
one that selectively stains cell nuclei, generally a basic stain.
used in the diagnosis of diseases of the eye, e.g. fluorescein and rose bengal dyes.
a stain introduced in living tissue or cells that have been removed from the body.
an area of increased density in a radiograph, due to collection of contrast material in distorted and abnormal vessels, prominent in the capillary and venous phases of arteriography, and presumed to indicate neoplasm.
a stain introduced into the living organism, and taken up selectively by various tissue or cellular elements. Often used to determine the live/dead cell ratio in a cell population.
a mixture of eosin and methylene blue, used for demonstrating blood cells.
one of carbol fuchsin counterstained with methylene blue; used to demonstrate acid-fast organisms, especially Mycobacterium spp., in smears and tissues. A modified method using mild acid to decolorize is used for staining Brucella spp. and Nocardia asteroides. See also acid-fast.