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Pruebas
A CD4 count is a blood test that measures the number of CD4 cells in a sample of your blood. CD4 cells are a type of white blood cell that circulates throughout the body in the blood. They're also called CD4 T lymphocytes or "helper T cells." That's because they help fight infection by triggering your immune system to destroy viruses, bacteria, and other germs that may make you sick.
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.
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The measurement of the ratio of activated T-lymphocytes expressing CD4 to the total number of T-lymphocytes in a sample expressed as a percent value.
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The determination of the amount of the CD4 expressing cells in a sample.
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The determination of the ratio of CD4 T cells compared to lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
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The determination of the number of regulatory T-lymphocytes expressing CD4, CD25 and FOXP3 present in a sample.
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The determination of the number of sub-population of double-negative T-lymphocytes (negative for both CD4 and CD8) in a sample.
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The determination of the number of sub-population of double-positive T-lymphocytes (T-lymphocytes that are both CD4+ and CD8+) in a sample.
Pruebas
The measurement of the ratio of helper T lymphocytes, which are T lymphocytes that express CD4, to the total number of blood cells in a sample expressed as a percent value.
Pruebas
The determination of the amount of T-cell surface antigen T4/Leu-3 in a sample.
