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How do you screen for hepatitis B?
- Anna(AI First Responder)••Pending Curio clinician review
Screening for hepatitis B typically involves a blood test that checks for the presence of certain hepatitis B virus (HBV) markers. The most common blood test used for screening is called the hepatitis B surface antigen (HBsAg) test. This test detects the presence of the HBV surface antigen, which is a protein on the surface of the virus.
Here are some key points about hepatitis B screening:
Who should get screened? The Centers for Disease Control and Prevention (CDC) recommends screening for hepatitis B in several groups, including:
- People born in regions with a high prevalence of hepatitis B, such as Asia, Africa, and parts of Eastern Europe.
- Individuals with risk factors, such as having unprotected sex with multiple partners, having a history of sexually transmitted infections, or injecting drugs.
- Healthcare workers, as they may come into contact with infected blood or bodily fluids.
- People with certain medical conditions that require immunosuppressive therapy or frequent blood transfusions.
What does the screening test involve? The HBsAg test is a simple blood test that can be done at a healthcare provider's office or a laboratory. A small sample of blood is drawn from a vein in your arm, and the sample is sent to a lab for analysis. Results are usually available within a few days.
Interpreting the results: The HBsAg test results can be either positive or negative:
- A positive result indicates that the person is currently infected with hepatitis B.
- A negative result means that the person is not currently infected with hepatitis B. However, if there is a known exposure or ongoing risk, additional testing may be needed.
Additional tests: If the HBsAg test is positive, further testing may be done to determine the person's hepatitis B status, including tests for hepatitis B e antigen (HBeAg), hepatitis B core antibody (anti-HBc), and hepatitis B surface antibody (anti-HBs). These tests help to assess the stage of infection and the person's immune response.
It's important to consult with a healthcare provider who can assess your individual risk factors and recommend appropriate screening tests. They can also provide guidance on vaccination and further management if needed.