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Blood tests. 1  Antibody tests. If there's a need for additional confirmation, a monospot test may be done to check your blood for antibodies to the Epstein-Barr virus. 2  White blood cell count. Your doctor may use other blood tests to look for an elevated number of white blood cells (lymphocytes) or abnormal-looking lymphocytes.
Hepatitis B virus (HBV) tests may be used for a variety of reasons. Some of the tests detect antibodies produced in response to HBV infection; some detect antigens produced by the virus, and others detect viral DNA.The main uses for HBV tests include: To determine whether acute signs and symptoms are due to HBV infection; two tests, hepatitis B surface Ag and hepatitis B core antibody IgM, may be performed as part of an acute viral hepatitis panel along with tests for hepatitis A (HAV) and hepatitis C (HCV) to determine which virus may be causing the infection.