Ch. 15 - Lab room
Neutropenia
A decrease below normal in the number of neutrophils in the blood, due to certain drugs, some acute infections, radiation, or certain diseases of the spleen or bone marrow.
Eosinophil
A granular white blood cell with a bilobed nucleus and cytoplasmic granules that stain brilliant red-orange with eosin dye.
Cell counter
A manual counter for differential white blood cell counts with keys for each type of white cell.
Wright's stain
A polychromatic stain for fixing and staining blood smears.
Granulocyte
A polymorphonuclear white blood cell that contains granules in its cytoplasm.
Polychromatic stain
A stain containing dyes of two or more colors, such as Wright's stain, which contains methylene blue and eosin.
Infectious mononucleosis
An acute infectious disease in which lymphocytes are both more numerous and larger than normal and often contain vacuoles, causing them to resemble monocytes.
Differential white blood cell count
Differential or "diff"; a determination of the percent of each type of white blood cell out of a total of 100 white blood cells observed under magnification by the oil immersion objective (100x) on a stained blood smear.
Hypersegmented
Having a nucleus with more than five segments , or lobes.
Mononuclear
Having an undivided nucleus, such as lymphocytes and monocytes.
Monocyte
The largest type of cell in the blood; an agranulocyte that has gray-blue cytoplasm when stained with the appearance of ground glass.
Basophil
The least common type of granular white blood cell, containing large cytoplasmic granules that stain blue-black with alkaline dyes.
Lymphocyte
The most common of all white blood cells in children; typically small and round with a nonsegmented nucleus and no cytoplasmic granules.
Neutrophil
The most common type of white blood cell; a granulocyte with a multilobed nucleus and cytoplasm filled with fine pink granules when stained with dye.
Agranulocytes
The third of white blood cells, including both monocytes and lymphocytes, that have few, visible granules.
