The Percentage of CD4 Positive Lymphocytes Is Determined by Flow

question 26

Multiple Choice

The percentage of CD4 positive lymphocytes is determined by flow cytometry using staining with fluorescent-tagged antibodies against CD3 and CD4, followed by whole blood RBC lysis.The dual platform uses what calculation to determine the absolute number of CD4 positive cells?

• A)Absolute CD4 count x 100
• B)Number of CD4+ cells x 100
• C)Absolute lymphocyte count x % CD4+ lymphocytes/100
• D)% lymphocytes x % CD4+ lymphocytes/100

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