Skip to content

Antibody to Epstein-Barr Virus (EBV) Nuclear Antigen (IgG) – Serum

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

This test measures the presence of antibodies against the Epstein-Barr virus (EBV), a common virus that can cause infections like mononucleosis. It helps determine if your immune system has encountered EBV.

Quick summary

["Assesses past or current EBV exposure through antibody detection."]

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

Key facts at a glance

LOINC
5355-3
Short code
ENA SM Ab Ser Ql CIE
Synonyms
ENA SM Ab Ser Ql CIE
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
cie
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 detects IgG antibodies specific to EBV’s nuclear antigen. IgG antibodies are typically produced after an initial infection and can remain in your blood for years, indicating past exposure. This helps distinguish between active infection and prior immunity.

Why It’s Ordered

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

When Results May Be Abnormal

High levels of EBV IgG antibodies suggest past infection or chronic exposure. Very low levels may indicate recent infection or a compromised immune response. Results alone don’t confirm active infection; they’re often used alongside clinical findings.

What to Expect Before the Test

No special preparation is needed. A blood sample is drawn from a vein, usually in your arm. You may feel slight discomfort, but it typically lasts only a few minutes.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: EBV IgG Antibody Testing

Short name

EBV IgG Antibody (Serum)

Frequently asked questions

How long does it take to get results?
Results are usually available within 1 to 3 business days, depending on your lab’s processing schedule. Your provider will discuss them with you during your follow-up visit.
Can I have this test if I’m pregnant?
Yes, this test is generally safe during pregnancy. However, always confirm with your healthcare provider before scheduling it, as some labs have specific guidelines for prenatal care.
What if my results are positive but I don’t have symptoms?
A positive result means you’ve likely had EBV in the past, but it doesn’t always mean you’re contagious. Some people remain asymptomatic even after infection. Your provider may recommend further testing (e.g., EBV viral load) if needed.
  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