Overview: Hepatitis B Core Total TestIntroduction: The Hepatitis B Core Total Test detects total antibodies to hepatitis B core to assess past or chronic infection, preventing liver damage. Following 2023 AASLD guidelines, it uses an immunoassay for high sensitivity, aiding in infectious disease screening. This test is critical for guiding diagnosis, treatment decisions, and improving outcomes in serology for patients with suspected hepatitis B exposure.
Other Names: Anti-HBc Total Assay, Hepatitis B Core Antibody Test.
FDA Status: FDA-cleared diagnostic test, meeting serology standards for diagnostic accuracy.
Historical Milestone: Hepatitis B core antibody testing began in the 1970s with HBV research. Total antibody immunoassays improved in the 1980s, enhancing past infection detection.
Purpose: Assesses past or chronic hepatitis B infection, guides treatment, and monitors anti-HBc total in patients to prevent liver damage.
Test Parameters: 1. Hepatitis B Core Total
Pretest Condition: No fasting required. Collect serum or saliva at any time. Report history of hepatitis B, vaccination, or risk factors, and list medications.
Specimen: 2-5 mL serum (SST) or 1-2 mL saliva (sterile container). Centrifuge serum within 1 hour. Transport in a biohazard bag within 8 hours.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document history of hepatitis B, vaccination status, or risk factors (e.g., IV drug use). Include current medications and recent infections.
Consent: Written consent required, detailing the tests purpose, diagnostic implications, and potential need for antiviral therapy or monitoring.
Procedural Considerations: Uses an immunoassay to detect total anti-HBc antibodies. Results are available in 1-2 days, enabling rapid clinical decisions.
Factors Affecting Result Accuracy: Improper sample handling or recent infection can affect results. Cross-reactivity with other infections may occur.
Clinical Significance: Positive anti-HBc total indicates past or chronic hepatitis B, prompting further testing (e.g., HBsAg, HBV DNA). Negative results suggest no prior exposure.
Specialist Consultation: Consult a hepatologist or infectious disease specialist for result interpretation and management planning.
Additional Supporting Tests: HBsAg, anti-HBs, HBV DNA, or liver function tests to confirm hepatitis B status.
Test Limitations: Cannot differentiate acute from chronic infection. Clinical correlation and additional testing are needed.
References: AASLD Hepatitis B Guidelines, 2023; Hepatology, Lok AS, 2022.
