Home
HelpTest Code HBGSN Hepatitis B Virus Surface Antigen Screen, Serum
Ordering Guidance
This test should not be used to test symptomatic individuals (ie, diagnostic purposes) who may or may not have risk factors for hepatitis B virus infection. For testing such patients, order HBAG / Hepatitis B Virus Surface Antigen, Serum.
This test should not be used to test or screen for chronic hepatitis B in pregnant individuals. For testing such patients, order HBAGP / Hepatitis B Virus Surface Antigen Prenatal, Serum.
This test is not intended for testing cadaver or grossly hemolyzed specimens. For testing such patients, order HBGCD / Hepatitis B Surface Antigen for Cadaveric or Hemolyzed Specimens, Serum, which is US Food and Drug Administration approved for testing on these sources.
Additional Testing Requirements
Testing for acute hepatitis B virus infection (HBV) should also include HBIM / Hepatitis B Virus IgM Core Antibody, Serum, as during the acute HBV infection "window period," hepatitis B virus surface (HBs) antigen and HBs antibody may not be detected.
Necessary Information
1. Date of collection is required.
2. Indicate if specimens are from autopsy/cadaver or hemolyzed sources so that the proper US Food and Drug Administration licensed assay can be performed.
Specimen Required
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: 0.9 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.
Secondary ID
610468Useful For
Diagnosis of acute, recent, or chronic hepatitis B
Determination of chronic hepatitis B status
This test is not offered as a screening or confirmatory test for blood donor specimens.
This test is not useful for diagnosis of hepatitis B during the “window period" of acute hepatitis B (ie, after disappearance of hepatitis B surface antigen and prior to appearance of hepatitis B surface antibody).
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| HBGSC | HBs Antigen Screen Confirmation, S | No | No |
Testing Algorithm
If the hepatitis B virus surface antigen (HBsAg) result is reactive with a cutoff index value greater than 1.00, then HBsAg confirmation testing will be performed at an additional charge.
The following algorithms are available:
-Hepatitis B: Testing Algorithm for Screening, Diagnosis, and Management
-HBV Infection-Monitoring Before and After Liver Transplantation
Special Instructions
Method Name
Electrochemiluminescence Immunoassay (ECLIA)
Reporting Name
HBs Antigen Scrn, SSpecimen Type
Serum SSTSpecimen Minimum Volume
0.7 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 |
Clinical Information
Hepatitis B virus (HBV) is a DNA virus that is endemic throughout the world. The infection is spread primarily through percutaneous contact with infected blood products (eg, blood transfusion, sharing of needles among injection drug users). The virus is also found in various human body fluids, and it is known to be spread through oral and genital contacts. HBV can be transmitted from mother to child during delivery through contact with blood and vaginal secretions, but it is not commonly transmitted transplacentally.
Hepatitis B virus surface antigen (HBsAg) is the first serologic marker appearing in the serum at 6 to 8 weeks following exposure to HBV. In acute infection, HBsAg usually disappears in 1 to 2 months after the onset of symptoms. Persistence of HBsAg for more than 6 months in duration indicates development of either a chronic carrier state or chronic HBV infection.
Interpretation
A reactive screen result (cutoff index value >1.00) confirmed as positive by hepatitis B virus surface antigen (HBsAg) confirmatory test is indicative of acute or chronic hepatitis B or chronic hepatitis B virus (HBV) carrier state.
Specimens with initially reactive screen results, but negative (not confirmed) by HBsAg confirmatory test results, are likely to contain cross-reactive antibodies from other infectious or immunologic disorders. These unconfirmed HBsAg-reactive screening test results should be interpreted in conjunction with test results of other HBV serologic markers (eg, HBs antibody; hepatitis B core [HBc] total antibody, and HBc IgM antibody). If clinically indicated, repeat testing at a later date is recommended.
Confirmed presence of HBsAg is frequently associated with HBV replication and infectivity, especially when accompanied by presence of hepatitis B e antigen or detectable HBV DNA.
See the following:
-Hepatitis B: Testing Algorithm for Screening, Diagnosis, and Management
-HBV Infection-Monitoring Before and After Liver Transplantation
Day(s) Performed
Monday through Saturday
Report Available
Same day/1 to 3 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
87340
G0499 (if appropriate)
87341 (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| HBGSN | HBs Antigen Scrn, S | 5196-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| HBAGS | HBs Antigen Scrn, S | 5196-1 |
Forms
If not ordering electronically, complete, print, and send Gastroenterology and Hepatology Test Request (T728) with the specimen.