Hepatitis B Blood Test (HBsAg)

Hepatitis B Surface Antigen (HBsAg), also known as Australia antigen is present on the surface of the Hepatitis B virus (HBV). This test detects the presence of Hepatitis B Surface Antigen (HBsAg) in the blood.
Reference: https://www.1mg.com/labs/test/hepatitis-b-s-1837

3. ●Hepatitis B is a viral hepatitis caused by Hepatitis B virus
●Hepatitis B surface antigen (HBsAg) is present on the surface of
Hepatitis B virus
●HBsAg test is done to confirm the presence or absence of
Hepatitis B virus in the blood
●HBsAg is also known as australia antigen
What is Hepatitis B surface antigen (HBsAg) test?

4. Why is Hepatitis B Surface Antigen
(HBsAg) test done?
HBsAg test is done in
●Patients with symptoms suggestive of Hepatitis B infection
●Patients with accidental exposure to Hepatitis B virus
●Those who are at risk of Hepatitis B infection like intravenous drug users who shares
needles, sex workers and patients undergoing blood transfusions
●Pregnant females to prevent transmission of Hepatitis B infection from mother to
child

5. How is Hepatitis B surface antigen test done?
●Hepatitis B surface antigen is done
on a blood sample.
●A syringe attached to a fine needle
is used to withdraw blood from a
vein of your arm

6. What does results of HBsAg mean?
●"Reactive" or "Positive" HBsAg test result means the person is
infected with Hepatitis B virus
●"Non-reactive" or "Negative" HBsAg test result means the
person is not infected with Hepatitis B virus

7. What should be done if the results of
HBsAg are positive?
●If a person tests “positive,” then further tests are required to determine if it is an
“acute” or a “chronic” Hepatitis B infection
●The treatment is different in patients with acute or chronic infection and regular
monitoring is required in these patients

8. For more details, visit
https://www.1mg.com/labs/test/hepatitis-b-s-1837