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HelpOrder Code HBCSN Hepatitis B Virus Core Total Antibodies Screen, Serum
Ordering Guidance
This test should not be used to test symptomatic individuals (ie, diagnostic purposes) suspected with viral hepatitis. For testing such patients with or without risk factors for hepatitis B virus (HBV) infection, order HBC / Hepatitis B Virus Core Total Antibodies, Serum.
This test should not be used to screen or test pregnant individuals with or without risk factors for HBV. For testing such patients, order HBCPR / Hepatitis B Virus Core Total Antibodies Prenatal, Serum.
If a hepatitis B core total antibody test that reflexes to hepatitis B core IgM is needed, order CORAB / Hepatitis B Virus Core Total Antibodies, with Reflex to Hepatitis B Virus Core Antibody IgM, Serum.
Necessary Information
Date of collection is required.
Specimen Required
Patient Preparation: For 24 hours before specimen collection, patient should not take multivitamins or dietary supplements (eg, hair, skin, and nail supplements) containing biotin (vitamin B7).
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Serum gel (red-top tubes are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 0.7 mL
Collection Instructions:
1. Centrifuge blood collection tube per manufacturer's instructions (eg, centrifuge and aliquot within 2 hours of collection for BD Vacutainer tubes).
2. Aliquot serum into a plastic vial.
Useful For
Diagnosis of recent or past hepatitis B
Determination of occult hepatitis B in otherwise healthy hepatitis B virus carriers with negative test results for hepatitis B surface (HBs) antigen, anti-HBs, anti-hepatitis B core IgM, hepatitis Be (HBe) antigen, and HBe antibody
This assay is not useful for differentiating between acute, chronic, past, or resolved hepatitis B.
This test should not be used as a screening or confirmatory test for blood donor specimens.
Testing Algorithm
For more information see Hepatitis B: Testing Algorithm for Screening, Diagnosis, and Management
Special Instructions
Method Name
Electrochemiluminescence Immunoassay (ECLIA)
Reporting Name
HBc Total Ab Scrn, SSpecimen Type
Serum SSTSpecimen Minimum Volume
0.6 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum SST | Frozen (preferred) | 90 days |
| Refrigerated | 6 days | |
| Ambient | 72 hours |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross Icterus | Reject |
| Heat-inactivated specimen | Reject |
Reference Values
Negative
Interpretation depends on clinical setting.
Method Description
The Elecsys Anti-HBc (hepatitis B virus core antibody) II assay is based on the competitive immunoassay principle and performed using an electrochemiluminescence immunoassay on the automated cobas e 801 analyzer. Patient's sample is pretreated first with a reducing reagent, and after the addition of synthetic HBc antigen (HBcAg), complexes are formed with HBc antibodies present in the sample. The remaining unbound sites on the HBcAg become occupied with the added biotinylated antibodies and ruthenium complex-labeled antibodies specific for HBcAg. The entire complex binds to the streptavidin-coated microparticles (solid phase) via interaction of biotin and streptavidin. The reaction mixture is then aspirated into the measuring cell where the microparticles are magnetically captured onto the surface of the electrode. After unbound substances are washed away, voltage is applied to the electrode that induces chemiluminescent emissions, which are measured by a photomultiplier. The test results are determined by comparing the electrochemiluminescence signal generated from the reaction product in the sample to the cutoff index (COI) value set from assay reagent lot-specific assay calibration.(Package insert: Elecsys Anti-HBc II. Roche Diagnostics; v1.0, 04/2022)
Day(s) Performed
Monday through Saturday
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
86704
G0499 (if appropriate)
Forms
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