Activated T Lymphocyte to Total Blood Cell Percent Measurement

**Semantic type:** Laboratory Procedure

**Definition:** The measurement of the ratio of activated T-lymphocytes, which are T lymphocytes that express HLA-DR and do not express CD19, to the total number of blood cells in a sample expressed as a percent value.

**Synonyms:** - % HLA-DR+CD19- T Cells - Activated HLA-DR Positive, CD19 Negative T Cell to Total Blood Cell Percent Measurement - Activated HLA-DR Positive, CD19 Negative T Lymphocyte to Total Blood Cell Percent Measurement - Activated T Cell to Total Blood Cell Percent Measurement - Percent HLA-DR+, CD19- Activated T Cells