leucocyte


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Related to leucocyte: Lymphocytes

leucocyte

See leukocyte.

leu·ko·cyte

(lū'kō-sīt)
A type of cell formed in the myelopoietic, lymphoid, and reticular portions of the reticuloendothelial system in various parts of the body, and normally present in those sites and in the circulating blood. Under various abnormal conditions, the total number of leukocytes may be increased or decreased or their relative proportions altered, and they may appear in other tissues and organs. Leukocytes represent three lines of development from primitive elements: myeloid, lymphoid, and monocytic series. On the basis of features observed with various methods of staining with polychromatic dyes, cells of the myeloid series are frequently termed granular leukocytes, or granulocytes; because the cytoplasmic granules of lymphocytes and monocytes are smaller and frequently not clearly visualized with routine methods, these cells are sometimes termed nongranular or agranular leukocytes. Granulocytes are commonly known as polymorphonuclear leukocytes (also polynuclear or multinuclear leukocytes), because in a mature cell the nucleus is divided into two to five rounded or ovoid lobes that are connected with thin strands or small bands of chromatin; they consist of three distinct types: neutrophils, eosinophils, and basophils, named on the basis of the staining reactions of the cytoplasmic granules. Cells of the lymphocytic series are smaller than other leukocytes and have relatively large, darkly staining, eccentrically placed nuclei. Cells of the monocytic series are usually larger than the other leukocytes and are characterized by a relatively abundant, slightly opaque, pale blue or blue-gray cytoplasm that contains many fine reddish-blue granules. Monocytes are usually indented, reniform, or shaped similarly to a horseshoe, but are sometimes rounded or ovoid; their nuclei are usually large and centrally placed and, even when eccentrically located, are completely surrounded by at least a small band of cytoplasm.
Synonym(s): white blood cell, leucocyte.
[leuko- + G. kytos, cell]

leucocyte

Any kind of white blood cell. The leukocytes include the neutrophil POLYMORPHONUCLEAR LEUKOCYTES (‘Polymorphs’), EOSINOPHILS, BASOPHILS, LYMPHOCYTES and MACROPHAGES.

leu·ko·cyte

(lū'kō-sīt)
Cell formed in myelopoietic, lymphoid, and reticular portions of the reticuloendothelial system in various parts of the body, and normally present in those sites and in the circulating blood.
Synonym(s): white blood cell, leucocyte.
[leuko- + G. kytos, cell]

leucocyte

leukocyte.

Patient discussion about leucocyte

Q. can i get a short explanation about white blood cells and their job? what does it mean if i have a insafition

A. White blood cells (WBC's) are the ones responsible for the immune system in the body. The white blood cell count rises in cases of infection, steroid use and other conditions. A low white blood cell count can have many causes, which need to be further evaluated by a doctor.

More discussions about leucocyte
References in periodicals archive ?
inhibition response of peripheral leucocytes to tuberculin in cats sensitized with viable Mycobacterium bovis (BCG).
Determination of total and differential counts of leucocytes : Total and differential numbers of leucocytes were determined using an Auto- hemocytometer (BT-2100, Dyn, USA) within 2 h after sampling according to the manufacturer's instructions.
23) who have shown that seminal fluid induces an inflammatory response in the cervix in humans after coitus, characterised by the influx of leucocytes and dendritic cells into the epithelium and stromal compartments and an accompanying increase in inflammatory cytokines such as IL-6 and IL-8.
The Department of Haematology, All India Institute of Medical Sciences (AIIMS), New Delhi, has been conducting an external proficiency testing programme (EPTP) for parameters like haemoglobin (Hb), total leucocyte count (TLC), reticulocyte count and peripheral blood smear (PBS) examination with nationwide laboratories as participants since 1992.
Two patients, both of whom had zero leucocytes present in the CSF and negative Gram stain results, grew coagulase-negative Staphylococcus species in culture broth.
A generalised linear model was applied to the median (range) sIgE and differential leucocyte concentration data from multiple subjects over multiple time points and between Phadiatop-positive and negative groups.
Leucocytes are the most important cellular components, which promote procoagulant milieu at the microvascular level during acute myocardial infarction.
1 Control, normal mice; DV4d, 4th day after infection DV; DV8d, 8th day after infection with DV; TLC, total leucocyte count Values are mean [+ or -] SD of 6 animals in each group P * <0.
This meant doctors should be able to test the effectiveness of removing potentially-infected leucocyte cells from the blood and develop a diagnostic blood test for vCJD.
Then the washed red cells are reinfused into the circulation using a 40 [micro]m leucocyte filter.
I am reminded of a cartoon by Lublin (9) where a unit of blood on an assembly line, undergoes pathogen inactivation, leucocyte reduction, treatment with enzymes to cleave A and B sugars from the RBCs and treatment with PEG to mask all other antigens.
Heparin-based coatings have been shown to decrease leucocyte activation and reduce blood loss and hemolysis.