leucocyte


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Related to leucocyte: Lymphocytes

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]

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 ?
Values of serum resistin, C-reactive protein and total leucocyte count are presented in Table-I.
Iron overload treatments exaggerated the leucocyte, platelet, and erythrocyte indices value.
Since patients with LSD were excluded from this study, we could not calculate the false-negative rate and also the specificity and sensitivity of estimated leucocyte enzyme activity.
Moreover, results of the present study (Figure 2) show a strong positive correlation between fractalkine expression and MDA level, 8-OHdG level, DNA fragmentation, and seminal leucocytes counts.
The main function of the human leucocyte antigens molecules is presenting the antigen (protein chain of antigen) to the T Lymphocytes and initiat ing the specific immune response.
(7) have shown that increased leucocyte and neutrophil counts with neutrophil/leucocyte ratio are a poor predictor for perforation, while Abidi et al.
Virulent UPEC strain: Moderate leucocyte infiltration (Grade 1.5) and sub mucous edema (Grade 2.0) of mouse bladder was seen DM mice after 24 hrs of challenge.
Total leucocyte count (x109/l)###7###8.61 +- 0.65###5.57 +- 0.38###0.000*
The aim of this biomarker Phase II study is to perform a series of evaluations regarding the diagnostic value of easily and fast provided laboratory parameters such as D-dimers, CRP, and leucocytes count to successfully detect an underlying PE in patients with pneumonia.
Previous studies have not been carried out regarding variation of differential leucocyte count except neutrophils; we therefore, intend to investigate the variation in the leucocyte profile during different phases of the menstrual cycle.
Keywords: Acute appendicitis, Mean platelet volume, C-reactive protein, Leucocyte count.