p23 (IgG)

Epstein-Barr Virus p23 (EBV-p23) IgG – What Your Test Result Means

What is Epstein-Barr Virus p23?

The Epstein-Barr Virus p23 (EBV-p23) marker detects IgG antibodies targeting a specific early antigen (EA-D) protein of the Epstein-Barr Virus (EBV)—a common herpesvirus that infects over 90% of people worldwide.

• The p23 protein is part of the early antigen complex, which appears during active viral replication.

• IgG antibodies to p23 suggest that your immune system recognizes and has responded to this specific EBV protein.

What Does an Elevated EBV-p23 IgG Mean?

• Elevated IgG to EBV-p23 may indicate:

  • A recent or reactivated EBV infection, or

  • Ongoing immune system activation in response to latent virus

• Since p23 is part of the early antigen complex, reactivity may reflect:

  • Viral reactivation under stress or immune suppression

  • Possible contribution to chronic fatigue, autoimmune activity, or neurological symptoms

This is particularly important on panels like Neural Zoomer Plus, which look for infections or immune responses that may affect brain and nerve function.

EBV Reactivation and Health Impacts

While most people carry EBV in a dormant state, reactivation can occur—sometimes without symptoms, and other times with effects such as:

• Fatigue or brain fog

• Chronic inflammation

• Flare-ups in autoimmune conditions (e.g., lupus, MS)

• Neurological or psychiatric symptoms (in rare cases)

Clinical Relevance of EBV-p23 IgG

This marker alone does not diagnose a disease, but a positive or elevated result may be meaningful when:

• You have symptoms like fatigue, cognitive decline, or autoimmunity

• Multiple EBV antibodies are elevated (e.g., VCA IgG, EBNA IgG, EA-D IgG)

• Other infections or neural autoantibodies are also detected

Summary

EBV-p23 IgG measures your immune system’s response to an early antigen of Epstein-Barr Virus. Elevated levels may reflect recent infection, chronic reactivation, or persistent immune system engagement with EBV. This marker is most useful when interpreted alongside your symptoms and other immune or neurological biomarkers.

p23 (IgG)

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