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Hepatitis B Surface Antibody, Qualitative
|In House Availability||Monday-Friday (day shift)|
|Container type||Gold top|
|Amount to Collect||1 mL blood|
|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)
|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.
|Last Updated||10/2/2010 11:52:02 AM|
If you have additional questions regarding this test, please call: 415-353-1667