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HelpTest Code HEAB Hepatitis B Virus e Antibody, Serum
Reporting Name
HBe Antibody, SUseful For
Determining the presence or absence of detectable hepatitis B virus e antibody in monitoring infection status of individuals with chronic hepatitis B
Determining infectivity of hepatitis B virus (HBV) carriers
Monitoring serologic response of chronically HBV-infected patients receiving antiviral therapy
Testing Algorithm
For more information see Hepatitis B: Testing Algorithm for Screening, Diagnosis, and Management
Method Name
Electrochemiluminescence Immunoassay (ECLIA)
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Serum SSTAdditional Testing Requirements
If ordered with HBVQN / Hepatitis B Virus (HBV) DNA Detection and Quantification by Real-Time PCR, Serum; send separate vials.
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 plastic vial.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum SST | Frozen (preferred) | 90 days | |
| Refrigerated | 6 days | ||
| Ambient | 72 hours |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
Special Instructions
Day(s) Performed
Monday through Saturday
CPT Code Information
86707
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HEAB | HBe Antibody, S | 33463-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| HEAB | HBe Antibody, S | 33463-1 |
Clinical Information
During recovery from acute hepatitis B, the hepatitis B e virus antigen (HBeAg) level declines and becomes undetectable and HBe antibody (anti-HBe) appears in the serum. Anti-HBe usually remains detectable for many years after recovery from acute hepatitis B.
In hepatitis B virus (HBV) carriers and in patients with chronic hepatitis B, positive anti-HBe results usually indicate inactivity of the virus and low infectivity of the patients. Positive anti-HBe results in the presence of detectable HBV DNA in serum indicate active viral replication.
For more information, see the following:
-Hepatitis B: Testing Algorithm for Screening, Diagnosis, and Management
Interpretation
Absence of hepatitis B e antigen (HBeAg) with appearance of HBe antibody (anti-HBe) is consistent with inactivity of the virus and loss of hepatitis B virus (HBV) infectivity.
Although resolution of chronic HBV infection generally follows the appearance of anti-HBe, the HBV carrier state may persist.
Cautions
For diagnostic purposes, results should always be assessed in conjunction with the patient’s medical history, clinical examination, and other findings.
Serum specimens from individuals taking multivitamins containing biotin or biotin supplements at 20 mg or more per day may have false-positive hepatitis B e antibody (anti-HBe) test results due to interference of biotin with the assay. Such individuals should stop taking these biotin-containing dietary supplements for a minimum of 12 hours before blood collection for this test.
In rare cases, interference due to extremely high titers of antibodies to analyte-specific antibodies, streptavidin, or ruthenium can occur, causing false-positive anti-HBe results. These effects are minimized by suitable test design.
Appearance of anti-HBe in serum does not completely rule-out chronic hepatitis B virus carrier state or infectivity.
Assay performance characteristics have not been established when Elecsys Anti-HBe assay is used in conjunction with other manufacturers’ assays for specific HBV serological markers.
Assay performance characteristics have not been established for the following specimen characteristics or specimen types:
-Grossly icteric (total bilirubin level of >66 mg/dL)
-Grossly lipemic (intralipid level of >2000 mg/dL)
-Grossly hemolyzed (hemoglobin level of >2000 mg/dL)
-Specimen types other than serum
Method Description
The Elecsys Anti-HBe (hepatitis B virus e antibody) assay is based on the competitive immunoassay principle and performed using an electrochemiluminescence method on the automated cobas e 801 immunochemistry analyzer. Anti-HBe present in the patient's sample binds to the added synthetic HBe antigen (HBeAg). The remaining unbound sites on the synthetic HBeAg become occupied with the added biotinylated antibodies and ruthenium complex-labeled antibodies specific for HBeAg. The entire complex becomes bound to 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, which induces chemiluminescent emission that is measured by a photomultiplier. Test result is determined by comparing the electrochemiluminescence signal generated from the reaction product to the cutoff index value set from reagent lot-specific assay calibration.(Package insert: Elecsys Anti-HBe. Roche Diagnostics; v1.0, 12/2021)