CD3+/CD4+, Abs.

Optimal Result: 300 - 1400 /uL.

Lymphocyte Subset Panel 2

From Healthmatters.io Team

Lab Results Explained and Tracked

What Does CD3+/CD4+, Abs Mean in a Blood Test?

CD3+/CD4+, Abs stands for the absolute count of CD4+ T-helper cells within the total population of CD3+ T cells in the blood. This marker measures the exact number of helper T cells per microliter (μL) of blood, rather than just their percentage. It is a key indicator of immune system function, especially in the context of infections like HIV, immune deficiencies, and chronic inflammatory conditions.

Understanding the Components

CD3+ T cells: Represent all mature T lymphocytes, which are crucial for adaptive immunity.
CD4+ T cells: A subset of CD3+ cells known as T-helper cells, which coordinate the immune response by signaling other immune cells (B cells, macrophages, cytotoxic T cells).
"Abs" (Absolute): Refers to the actual number of CD3+/CD4+ cells per microliter of blood, typically expressed as cells/μL.

Why Is CD3+/CD4+, Absolute Count Important?

This marker is especially valuable for:

Monitoring HIV infection and disease progression
Diagnosing and tracking immunodeficiencies
Evaluating immune recovery after bone marrow transplantation or chemotherapy
Assessing immune activity in autoimmune or chronic inflammatory diseases

Normal Range

Typical reference range: 500 to 1,500 cells/μL
- Values may vary slightly between laboratories and based on age or clinical context.
- A CD4 count below 200 cells/μL is considered a critical threshold in HIV, often used to define AIDS.

What Can a Low CD3+/CD4+, Abs Level Indicate?

HIV/AIDS: One of the most common causes of decreased CD4+ counts. HIV specifically targets and destroys CD4+ T cells.
Primary immunodeficiencies: Congenital disorders like SCID (Severe Combined Immunodeficiency)
Bone marrow suppression: From chemotherapy, radiation, or certain infections
Severe infections: Such as tuberculosis or cytomegalovirus (CMV)
Autoimmune diseases: In some cases, CD4+ cells are depleted due to immune system dysregulation

What Can a High CD3+/CD4+, Abs Level Indicate?

Autoimmune diseases: Such as rheumatoid arthritis or lupus, where the immune system is overactive
Allergic or atopic conditions: Asthma, eczema, or chronic allergies can stimulate CD4+ T cell production
Recovery phase after infection or immunosuppression: CD4+ levels may temporarily rise as the immune system rebounds
Certain leukemias or lymphoproliferative disorders: Rarely, elevated levels may reflect abnormal immune cell growth

How Is This Test Used in Practice?

CD3+/CD4+, Absolute Count is typically used alongside:

CD8+ T cell counts
CD4/CD8 ratio
Total lymphocyte count
HIV viral load (if applicable)
Clinical symptoms and history

It plays a central role in HIV care, helping guide decisions about when to start antiretroviral therapy or prophylactic antibiotics to prevent opportunistic infections.

Summary

The CD3+/CD4+, Absolute Count measures the number of helper T cells (CD4+) within your T-cell population, expressed as cells per microliter of blood. It is a key indicator of immune system health, especially in monitoring HIV, autoimmune conditions, immune recovery, or immune suppression. Abnormal values—either low or high—should be interpreted alongside other immune markers and your overall clinical context.

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CD3+/CD4+, Abs.

What Does CD3+/CD4+, Abs Mean in a Blood Test?

Understanding the Components

Why Is CD3+/CD4+, Absolute Count Important?

Normal Range

What Can a Low CD3+/CD4+, Abs Level Indicate?

What Can a High CD3+/CD4+, Abs Level Indicate?

How Is This Test Used in Practice?

Summary

All Your Lab Results. One Simple Dashboard.

All Your Lab Results. One Simple Dashboard.

Import, Track, and Share Your Lab Results Easily

Import, Track, and Share Your Lab Results

Article Review & Sources

Bring All Your Lab Results Together — In One Place

Gather Your Lab History — and Finally Make Sense of It

Finally, Your Lab Results Organized and Clear

Advanced Plan

Unlimited Account

Pro Monthly

What's included in a Healthmatters membership

Import Lab Results from Any Source

See Your Health Timeline

Understand What Your Results Mean

Enter Your Lab Reports Yourself — Always Free Enter Your Lab Reports — Always Free

Visualize Your Results

Export Your Complete Lab History in a Single File Export Your Complete Lab History

Comprehensive Data Entry Service for Your Reports Data Entry Service for Your Reports

Securely Share With Anyone You Trust

Let Your Lab Results Tell the Full Story

Once your results are in one place, see the bigger picture — track trends over time, compare data side by side, export your full history, and share securely with anyone you trust.

Bring all your results together to compare, track progress, export your history, and share securely.

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We implement proven measures to keep your data safe.

All Your Lab Results.
One Simple Dashboard.

All Your Lab Results.
One Simple Dashboard.