Serologic Interpretation of Epstein-Barr Virus Infection

Understanding the Serologic Pattern

• The presence of positive EBNA with negative IgM indicates past EBV infection, not current acute disease, as EBNA antibodies appear late in EBV infection and persist indefinitely, indicating remote past infection 1
• The diagnostic pattern for acute Infectious Mononucleosis requires positive VCA IgM, positive or negative VCA IgG, and absent EBNA, which is not present in this case 1
• A positive EBNA with negative IgM demonstrates past EBV infection, likely months to years ago, and developed immunity 1
• VCA IgG greater than a certain threshold without accompanying IgM indicates past infection rather than acute or recent infection 1

Clinical Implications and Next Steps

• Chronic Active EBV requires persistent IM-like symptoms, unusual antibody patterns with markedly elevated VCA and EA titers, and exclusion of other diseases, which is not applicable in this case 2, 3
• Chronic Active EBV is a rare, serious condition characterized by chronic symptoms lasting months, not the 3-week presentation described here 2, 4