The HBsAg Test detects the hepatitis B surface antigen, a protein associated with the Hepatitis B virus (HBV). It is commonly used as an initial screening test to identify possible current HBV infection.
Hepatitis B affects the liver and may cause either acute or chronic infection. Early identification can help healthcare professionals determine the need for further testing, monitoring, and appropriate care.
What Does the HBsAg Test Help Assess?
- Hepatitis B Screening: Detects the surface antigen associated with HBV infection.
- Liver Health Evaluation: Supports investigation when Hepatitis B infection is suspected.
- Clinical Follow-up: Helps guide further assessment after a reactive screening result.
- Preventive Healthcare: May be recommended as part of screening based on clinical needs or applicable guidelines.
Sample Requirements
- Sample type: Blood, typically serum or plasma, depending on the validated method.
- Fasting: Not required.
- Preparation: No special preparation is usually needed.
Understanding Your Results
- Non-reactive: HBsAg was not detected by the test. This does not exclude every possible HBV infection, particularly very early infection.
- Reactive: HBsAg was detected and further evaluation or confirmatory testing may be required according to the assay and applicable guidelines.
Additional tests may include anti-HBc, anti-HBs, HBeAg, HBV DNA, and liver function tests, depending on the clinical situation.
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