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Line Blot Analysis for Antibodies Against Epstein-Barr Virus (EBV) Nucleocapsid

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

This test detects specific antibodies in your blood that may indicate exposure to Epstein-Barr virus (EBV), a common virus that can cause infections like mononucleosis.

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
88882-6
Short code
ENA SM-B Ab Ser Ql Line blot
Synonyms
ENA SM-B Ab Ser Ql Line blot
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
line-blot
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 Is This Test Measuring?

A line blot assay examines your blood for antibodies against EBV’s nucleocapsid protein. This helps determine if your immune system has encountered EBV, which can occur after infection or vaccination.

Why Might This Test Be Ordered?

Your healthcare provider may recommend this test if you have symptoms of EBV infection (e.g., fatigue, swollen lymph nodes), if you’re investigating chronic fatigue syndrome, or if you’re evaluating immune responses post-vaccination.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in your arm. The sample is processed and tested in a lab using a line blot technique to detect specific antibody lines against EBV.

What Does a Positive Result Mean?

A positive result suggests your immune system has recognized EBV, but it doesn’t confirm active infection. It may indicate past exposure or a latent infection. Further evaluation by your provider may be needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps differentiate between acute EBV infection, chronic infection, or past exposure. It can support diagnosis in conditions like infectious mononucleosis, post-transplant lymphoproliferative disorder, or autoimmune disorders linked to EBV.

Short name

EBV Antibody Line Blot Test

Frequently asked questions

How long does it take to get results?
Results are usually available within 3 to 7 business days, depending on lab processing times.
What does it mean if my test is negative?
A negative result means your blood sample did not detect antibodies against EBV nucleocapsid protein at the time of testing. This could mean you haven’t been exposed to EBV recently or the test was conducted too early after exposure.
Can this test be used to diagnose active EBV infection?
No, this test alone cannot diagnose active EBV infection. It may be used alongside other tests (like viral load or viral DNA testing) for a comprehensive evaluation.
  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