Pruebas
Differential Leukocyte Count
A hematologic procedure for the evaluation of the qualitative and quantitative characteristics of the white cells in peripheral blood smears and bone marrow aspirates.
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Pruebas
A hematologic procedure for the evaluation of the qualitative and quantitative characteristics of the white cells in peripheral blood smears and bone marrow aspirates.
Pruebas
The measurement of the number of helper T lymphocytes, which are T lymphocytes that express CD4, in a cubic millimeter of blood. It is calculated by multiplying 1000 by both the total leukocyte count and the percent of helper T cells in the differential leukocyte count.
Pruebas
The measurement of the number T lymphocytes, which are leukocytes that express CD3, in a cubic millimeter of blood. It is calculated by multiplying 1000 by both the total leukocyte count and the percent of T cells in the differential leukocyte count.
Technology
A DNA sequencing technique that can differentiate cytosine from 5-methylcytosine in a DNA sample. First, a denatured DNA sample is treated with bisulfite which converts non-methylated cytosine to uracil. Next, the sample is amplified using a PCR method that does not discriminate between non-methylated and methylated sequences. The amplified DNA is subjected to nucleotide sequencing. The resulting sequence is compared to an identical control sample of DNA that was not treated with bisulfite. Unmethylated cytosines will be displayed as cytosines in the control sample and as thymines in the bisulfite-treated sample.
Technology
Comparative genomic hybridization (CGH) is a technique that allows the detection of losses and gains in DNA copy number across the entire genome without prior knowledge of specific chromosomal abnormalities. Comparative genomic hybridization utilizes the hybridization of differentially labeled tumor and reference DNA to generate a map of DNA copy number changes in tumor genomes. Comparative genomic hybridization is an ideal tool for analyzing chromosomal imbalances in archived tumor material and for examining possible correlations between these findings and tumor phenotypes. (from Ried et al. J Mol Med 1997 75:801-14)
Technology
A method of separating macromolecules by either their differential rate of sedimentation in a centrifugal gradient or their differential buoyancy in a density gradient. (from biology-text.com)
Technology
This is a method (named after the Danish bacteriologist, Hans Christian Gram) for staining and identifying bacteria. It is based on the differential retention of a crystal violet-iodine complex within the cell membrane. Gram-positive organisms will appear blue-black or purple while Gram-negative organisms will appear red.
Technology
Immunohistochemical staining techniques allow for the visualization of antigens via the sequential application of a specific antibody to the antigen (primary antibody), a secondary antibody to the primary antibody and an enzyme complex with a chromogenic substrate. The enzymatic activation of the chromogen results in a visible reaction product at the antigen site. The specimen may then be counterstained and coverslipped. Results are interpreted using a light microscope and aid in the differential diagnosis of pathophysiological processes, which may or may not be associated with a particular antigen.
Pruebas
The total number of white blood cells that are basophils. It is calculated by multiplying the white blood cell count by the percent of basophils in the differential white blood cell count.
Pruebas
The total number of white blood cells that are eosinophils. It is calculated by multiplying the white blood cell count by the percent of eosinophils in the differential white blood cell count.
Artículo
Research record from J Clin Pathol, 2026-08-20. PMID 42331602.
Pruebas
A blood differential test measures the amount of each type of white blood cell (WBC) that you have in your blood. This test can help diagnose or monitor an infection or condition that affects your immune system .