Epstein Barr Nuclear Antigen IgG Test

Epstein-Barr-Nuclear-Antigen-IgG test is used to detect the presence of antibodies for Epstein-Barr virus. The test helps diagnose infection with the virus, which causes mononucleosis. Pregnant women may also have to undergo this test along with several other tests if they show symptoms of viral infection. The test may also be performed in individuals who have been in contact with a person suffering with mononucleosis. Your doctor may order an Epstein-Barr-Nuclear-Antigen-IgG test if you show symptoms like extreme weakness, fever, fatigue, sore throat, headache, enlarged liver/spleen/or both, and swollen lymph glands. Repeat tests may be ordered to monitor treatment outcomes.

The patient does not have to make any special preparation before taking this test. It is a simple blood test and fasting is not required. If you have any concerns, you can talk to your doctor to clarify any doubts related to the need, risks, importance and results of the test. You may however have to be prepared for a repeat test because very little antibodies are detected early on in the illness. The doctor might ask you to test again in 10-14 days.

Positive test indicates that you are suffering from an Epstein-Barr virus infection or mononucleosis. However, some patients do not show symptoms of the disease even if the test results appear positive. The doctor may suggest future course of action and treatment in such a scenario. Repeat test may also be advised if necessary.

Since this is a blood test, you will have to give a blood sample. Firstly, the site, usually upper arm, is cleaned with an antiseptic and an elastic band is wrapped around it to make the vein visible. A needle is gently inserted in the vein and blood is collected in a tube. After this, the elastic band is removed and the needle site is rubbed with a cotton ball. Applying pressure on the site helps stop blood flow.