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Hepatitis B Surface Antibody, Qualitative
| Item | Value |
|---|---|
| Approval req'd? | No |
| Available Stat? | No |
| Test code | HBAB |
| Test group | Hepatitis |
| Performed by | Immunology |
| In House Availability | Monday-Friday (day shift) |
| Method | Chemiluminescent Immunoassay |
| Container type | Gold top |
| Amount to Collect | 1 mL blood |
| Sample type | Serum |
| Preferred volume | 0.5 mL serum |
| Processing notes | Refrigerate sample. Note: If Hepatitis B Surface Ab, Quantitative is ordered refer the request to the immunology resident. If approved, order Quest test #8475X (MOLT) |
| Normal range | Negative |
| Synonyms | HBsAb; Hep B Surface Ab; HBV;. anti-HBs; anti-HBsAg; surface antibody |
| Stability | Refrigerated 4 days |
| Turn around times | 1-3 days |
| Additional information | HBsAb is a marker of immunity due to HBV infection at some time in the past or to immunization with hepatitis B vaccine. It has no role in the diagnosis of acute HBV infection, which should employ HBsAg and HBc IgM Antibody. The in-house qualitative assay, when positive, reflects and antibody level of ≥ 10 mIU/mL. This represents an adequate protective antibody level in dialysis patients. Quantitation is not required for this population. Quantitation (send-out to Quest) may be useful in patients with Hepatitis B who are receiving Hepatitis B immune globulin therapeutically. The positive cut-off of the in-house assay is too low to be useful in this setting. |
| LOINC code | 22322-2 |
| Last Updated | 10/2/2010 11:52:02 AM |
| Entry Number | 481 |
If you have additional questions regarding this test, please call: 415-353-1667