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About the test
What is this test done for?
HBsAG is an acronym for hepatitis B surface antigen. It is done to assess levels of the antigen in blood.
Why is it Done?
HBsAG is performed to confirm the presence of a hepatitis B virus infection
When should it be performed?

Hepatitis B tests is ordered when a doctor suspects acute hepatitis, to determine if the symptoms are due to infection with Hepatitis B Virus (HBV). Some of symptoms include the following:

  • Fever
  • Fatigue
  • Loss of appetite
  • Nausea, vomiting
  • Abdominal pain
  • Dark urine,
  • Pale stools
  • Jaundice
  • To assess recovery after treatment
  • To diagnose chronic hepatitis B infection
  • To monitor improvement with treatment
  • In pregnant women as part of routine screening
  • Before undergoing any surgery
How is it done
A blood sample will be collected from a vein in your arm. Fasting is not necessary for collection of sample.
  • A positive result means that there is either an acute or chronic hepatitis B virus infection. Whether it is acute or chronic is determined by reading the results along with other hepatitis B virus test results.
  • A negative result can mean any of the following-
  • No infection today or in the past
  • Resolving or Resolved acute infection
  • Immunity due to Hepatitis B virus vaccine
Other Tests
  • Anti-HBc-IgM
  • Anti-HBc-Total
  • HBeAg
  • Antibody to hepatitis B e protein
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