Skip to content

Epstein-Barr Virus Nuclear Antigen IgG, Serum (Qualitative Immunoassay)

Published: August 9, 2026Updated: August 16, 2026

This test detects antibodies to Epstein-Barr virus (EBV) in your blood. It helps determine if your immune system has ever been exposed to the virus.

Quick summary

["Assesses past or current EBV infection through antibody presence."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
84872-1
Short code
EBV NA 1 IgG Ser Ql IA.rapid
Synonyms
EBV NA 1 IgG Ser Ql IA.rapid
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia-rapid
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

The test looks for IgG antibodies specific to EBV’s nuclear antigen. These antibodies develop after your body has encountered the virus, usually within weeks to months of infection. IgG antibodies remain in your system long-term, marking past exposure.

Why It’s Done

Doctors may order this test to diagnose or monitor EBV infection, evaluate immune function, or assess conditions like infectious mononucleosis, lymphoma, or chronic fatigue syndrome where EBV is suspected.

When to Expect Results

Results are typically available within 1–3 business days. A positive result indicates past infection; a negative result suggests no detectable antibodies at the time of testing.

What to Expect During the Test

A small blood sample is drawn from your arm. You may feel a brief pinch, but it’s quick. No special preparation is needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

EBV IgG Antibody (Qualitative)

Frequently asked questions

Why might I need this test?
Your doctor may recommend it if you have symptoms like fatigue, sore throat, or swollen lymph nodes, or if you’re being evaluated for conditions like mononucleosis, lymphoma, or immune-related illnesses.
What does a positive result mean?
A positive result means your body has produced antibodies to EBV, suggesting you’ve had the virus at some point. It doesn’t show if you’re currently infected, but it can help track long-term immune response.
Can I get this test if I’m pregnant?
Yes, this test is generally safe during pregnancy. However, always discuss any test with your healthcare provider to ensure it’s appropriate for your situation.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy