Epstein-Barr Virus Nuclear Antigen (EBNA) Antibody Titration by Immunoassay

Why This Test Matters

EBV is often called the 'infection that stays' because it can remain in your body for life. After an initial infection, your immune system may produce antibodies like EBNA, which can persist. This test specifically looks for EBNA antibodies to check if you’ve had a past EBV infection or if your immune system is still responding to it.

What the Test Measures

The EBNA antibody test detects the presence and level of EBNA antibodies in your blood. These antibodies are produced by your immune system in response to the virus’s nuclear proteins. The test helps differentiate between recent and past infections, though it doesn’t indicate active disease.

Preparation and Sample Collection

No special preparation is needed for this blood test. A healthcare provider will draw blood from a vein, usually in your arm. The sample is sent to a lab for analysis using an immunoassay method to measure antibody levels.

What to Expect After the Test

You may experience mild discomfort or bruising at the injection site, but this usually fades quickly. Results are typically ready within a few days to a week, depending on lab processing times. Your healthcare provider will discuss the results with you during a follow-up visit.