Lymphocyte subsets

Diagnostic Use

Enumeration of lymphocytes - CD3+ T cells, CD3+CD4+ T helper cells, CD3+CD8 cytotoxic T cells, CD19+ B cells, CD16/56+ NK cells.

EDTA samples must arrive within 24 hours of venesection for viable testing.
Assay is run within routine hours only (08:00 - 16:30 Monday-Friday), samples MUST arrive before 14:00 on a Friday.

A CBC with differential is an essential component of this test, please request in addition to LSMA. If the sample will take more than 6 hours to reach the Immunology laboratory please perform the CBC at the referring laboratory and send the result with the sample.

Refrigerated samples are unacceptable.



Delphic Registration Code


Laboratory Handling


1 x EDTA (lavender), send to lab immediately


Phone lab and send direct to immunology at room temperature. Sample received after hours place into immunology bin at room temperature


CD4 count
CD4:CD8 ratio
CD8 count
T & B cell subsets
T cell subsets

Turnaround Time

4 days

Test Code