CD4+ Lymphocyte Count

CD4 Lymphocytes are T cells (helper cells), produced primarily in the thymus, and play a significant role in cellular immunity.

A drop in CD4 lymphoctes accompanies the transition from an HIV positive state to AIDS. 

Normal Values*

CD4 Helper cells (relative) 34-67%
CD4 Helper cells (absolute) 493-1191cells/Ál
CD4 Helper cells (AIDS Criteria) <200 cells/Ál

*These are general values taken from a variety of sources. The actual normal values may vary from lab to lab and from one type of testing protocol to another.

Source: Operational Medicine 2001,  Health Care in Military Settings, NAVMED P-5139, May 1, 2001, Bureau of Medicine and Surgery, Department of the Navy, 2300 E Street NW, Washington, D.C., 20372-5300

Gynecology and Obstetrics CD-ROM
Volumes 1-6
2004 Edition
Lippincott Williams & Wilkins
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