Epstein-Barr Virus (EBV) Nuclear Antigen IgG Antibody, Serum
This test measures the presence of antibodies to the nuclear antigen of Epstein-Barr virus (EBV) in your blood. These antibodies indicate past or current infection by EBV, a common virus that can cause infections like mononucleosis.
["This test helps determine if you’ve been exposed to EBV or if your immune system is still responding to it."]
Key facts at a glance
- LOINC
- 31373-4
- Short code
- EBV NA IgG CSF-aCnc
- Synonyms
- EBV NA IgG CSF-aCnc
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
What Does This Test Measure?
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 system for years, showing long-term immunity or past exposure.
Why Might You Need This Test?
Your healthcare provider may order this test if you have symptoms of EBV infection (e.g., fatigue, sore throat, swollen lymph nodes), if you’ve been exposed to someone with EBV, or if you’re investigating chronic conditions linked to EBV, such as certain cancers or autoimmune diseases.
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. The process usually takes a few minutes, and you may feel slight discomfort.
What to Expect After the Test
After the blood draw, you may experience mild bruising or soreness at the site. Apply pressure to the area to help stop bleeding. You can resume normal activities immediately.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Positive results suggest past or current EBV infection. While most people recover fully, some may experience long-term effects or develop complications like chronic fatigue syndrome or certain cancers. This test is not used to diagnose acute EBV infection but can help assess exposure and immune response over time.
Short name
EBV IgG Antibody
Frequently asked questions
How long does it take to get results from this test?
Can I have this test if I’m pregnant?
Does this test differentiate between acute and chronic EBV infection?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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