Epstein-Barr Virus Viral Capsid Antigen (VCA) Antibody Blood Test, IgG
Epstein-Barr virus (EBV) antibodies blood tests are used to help diagnose EBV infection, the most common cause of infectious mononucleosis (mono) if a person is symptomatic but has a negative mono test. These tests may be ordered for an asymptomatic person to see if that person has been previously exposed to EBV or is susceptible to a primary EBV infection.
Extreme weakness or fatigue
Swollen lymph glands in the neck and/or armpits
Enlarged spleen and/or liver (sometimes)
The VCA-IgG antibody will appear during an acute infection. The highest level will be at 2-4 weeks. It will then drop, maintain and then be present for life.
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