EBV EBNA IgG: What a Positive Result Means

This test detects the presence of IgG antibodies directed against the Epstein-Barr nuclear antigen in your blood. EBNA antibodies develop during the convalescent phase of EBV infection, typically six to eight weeks or later after the onset of symptoms. Their presence generally indicates that the acute phase of infection has passed.

EBV EBNA IgG testing helps distinguish between a past and a recent EBV infection. Since EBNA antibodies typically do not appear during the acute phase, their presence suggests that the infection occurred in the past. This differentiation can be important for clinical assessment, particularly when evaluating unexplained fatigue or other symptoms. Results should be interpreted by a healthcare professional.

Testing may be recommended when investigating symptoms such as prolonged fatigue, swollen lymph nodes, or recurrent sore throat, particularly when differentiating between a past and recent EBV infection is clinically relevant. Consult a healthcare professional for guidance.