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  2. List of human blood components - Wikipedia

    en.wikipedia.org/wiki/List_of_human_blood_components

    Basophil granulocytes, adult, range 0.015-0.15 × 10 6: Basophils, adult, median 0.03 × 10 6: Lymphocytes, birth 2-11 × 10 6: Lymphocyte, pediatric 1.5-8.0 × 10 6: Lymphocyte, adult, range 1.5-4.0 × 10 6: Lymphocyte, adult, median 2.5 × 10 6: Monocytes, birth, range 0.4-3.1 × 10 6: Monocytes, birth, median 1.05 × 10 6: Monocytes ...

  3. Lymphocytosis - Wikipedia

    en.wikipedia.org/wiki/Lymphocytosis

    In adults, absolute lymphocytosis is present when the lymphocyte count is greater than 5000 per microliter (5.0 x 10 9 /L), in older children greater than 7000 per microliter and in infants greater than 9000 per microliter. [1] Lymphocytes normally represent 20% to 40% of circulating white blood cells. When the percentage of lymphocytes exceeds ...

  4. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...

  5. White blood cell differential - Wikipedia

    en.wikipedia.org/wiki/White_blood_cell_differential

    A white blood cell differential is a medical laboratory test that provides information about the types and amounts of white blood cells in a person's blood. The test, which is usually ordered as part of a complete blood count (CBC), measures the amounts of the five normal white blood cell types – neutrophils, lymphocytes, monocytes, eosinophils and basophils – as well as abnormal cell ...

  6. Lymphocytopenia - Wikipedia

    en.wikipedia.org/wiki/Lymphocytopenia

    Lymphocytopenia is commonly caused by a recent infection, such as the common cold or COVID-19. [3]Lymphocytopenia, but not idiopathic CD4+ lymphocytopenia, is associated with corticosteroid use, infections with HIV and other viral, bacterial, and fungal agents, malnutrition, systemic lupus erythematosus, [4] severe stress, [5] intense or prolonged physical exercise (due to cortisol release ...

  7. Helper/suppressor ratio - Wikipedia

    en.wikipedia.org/wiki/Helper/suppressor_ratio

    Normal values (95% confidence intervals) are approximately 30-60% CD4 and 10-30% CD8 depending on age (ratio 0.9 to 3.7 in adults). [1] One reason for abnormal results is the loss of CD4-positive cells to the human immunodeficiency virus (HIV) infection. The loss of CD4-positive cells to HIV infection can result in various distortions in the ...

  8. Complete blood count - Wikipedia

    en.wikipedia.org/wiki/Complete_blood_count

    Based on a statistical normal distribution, the tested samples' ranges vary with sex and age. [179] On average, adult females have lower hemoglobin, hematocrit, and red blood cell count values than males; the difference lessens, but is still present, after menopause. [180] CBC results for children and newborn babies differ from those of adults.

  9. Lymphocyte - Wikipedia

    en.wikipedia.org/wiki/Lymphocyte

    A lymphocyte is a type of white blood cell (leukocyte) in the immune system of most vertebrates. [1] Lymphocytes include T cells (for cell-mediated and cytotoxic adaptive immunity), B cells (for humoral, antibody-driven adaptive immunity), [2] [3] and innate lymphoid cells (ILCs; "innate T cell-like" cells involved in mucosal immunity and homeostasis), of which natural killer cells are an ...