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Epstein-Barr Virus Nuclear Antigen IgG Antibody (Serum)

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

This test measures the presence of antibodies to Epstein-Barr virus (EBV) in your blood. These antibodies indicate past or current infection by the virus, which can cause conditions like mononucleosis.

Quick summary

["This test helps determine if you’ve been exposed to EBV, which can affect immunity and may be linked to certain health conditions."]

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

Key facts at a glance

LOINC
30083-0
Short code
EBV NA IgG Ser IA-aCnc
Synonyms
EBV NA IgG Ser IA-aCnc
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
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 Does This Test Measure?

The test detects **IgG antibodies** specific to EBV’s nuclear antigen. These antibodies develop after your body has encountered the virus, usually within weeks to months after infection. IgG antibodies remain in your blood long-term, providing immunity against reinfection.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms of EBV infection (e.g., fever, fatigue, swollen lymph nodes) or if you’re investigating conditions linked to EBV, such as chronic fatigue syndrome, certain cancers, or autoimmune diseases.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, typically drawn from your arm. The sample is sent to a lab for analysis. Results are usually available within a few days.

What the Results Mean

A positive result means you likely had EBV at some point. A negative result suggests you either haven’t been exposed or were tested too soon after infection. Results alone don’t diagnose EBV; they’re used alongside clinical findings.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

EBV IgG Antibody

Frequently asked questions

How long does it take to get results?
Results are typically ready within 3–5 business days, depending on lab processing times. Your healthcare provider will contact you once they’re available.
What does a high or low IgG level mean?
A high IgG level confirms past EBV exposure. A low or negative level means you likely haven’t been exposed recently. Neither result alone indicates active illness; they’re part of a broader evaluation.
Can I get EBV from this test?
No, the test only detects antibodies—it does not transmit EBV. Blood samples are handled safely to prevent contamination.
  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