Hbsag (hepatitis B Surface Antigen)

The Hepatitis B Surface Antigen (HBsAg) test is a blood test used to detect the presence of the Hepatitis B virus (HBV) in a person's blood. This antigen is a protein found on the surface of the virus, and its presence indicates an active HBV infection.

To diagnose acute or chronic Hepatitis B infection.

• To screen for Hepatitis B, especially for people at higher risk, such as healthcare workers, people who inject drugs, or those in close contact with someone with HBV.
• To monitor individuals at risk of liver damage or liver cancer due to Hepatitis B.

• People at high risk of exposure to the Hepatitis B virus
• People born in regions with high HBV prevalence
• People with a history of certain medical conditions or risk factors
• Pregnant women
• People with a family history of hepatitis B

The HBsAg test is a critical component in the diagnosis and management of hepatitis B infection. Regular screening in high-risk populations and monitoring in those with known infections can significantly impact public health by preventing transmission and managing the disease effectively.

Hepatitis B Virus (HBV): A virus that causes inflammation of the liver, which can lead to both acute and chronic liver diseases. Chronic infection can result in severe liver complications, including cirrhosis and liver cancer.

 HBsAg: This antigen is a component of the virus itself and indicates that the virus is present in the blood. A positive HBsAg test means that the person is infectious.

Risk Factors for Hepatitis B Infection

Understanding who is at risk helps emphasize the importance of the HBsAg test:

• High-Risk Behaviour: Injection drug use, unprotected sexual contact, and sharing personal items (like razors) with an infected person.
• Chronic Conditions: Individuals with conditions that require blood transfusions or dialysis.
• Occupational Exposure: Healthcare workers and others who might be exposed to blood.

Other Names:

Hepatitis B Antigen Test, HBsAg Test, Hepatitis B Surface Antigen Test, HBV Surface Antigen Test, Hepatitis B Virus Surface Antigen Test