Hepatitis B Surface Antigen (HBsAg) with Reflex Confirmation - (QUEST DIAGNOSTICS)
Hepatitis B surface antigen is the earliest indicator of the presence of acute infection. Also indicative of chronic infection. Test is useful in the differential diagnosis of hepatitis. Patients who are negative for HBsAg may still have acute type B viral hepatitis. There is sometimes a “core window” stage when HBsAg has become negative and the patient has not yet developed the antibody (anti-HBs). In cases with strong clinical suspicion of viral hepatitis, serologic testing should not be limited to detecting HBsAg, but should include a battery of tests to evaluate different stages of acute and convalescent hepatitis.
Hepatitis B Surface Antigen with Reflex Confirmation. Positive samples will be confirmed based on the manufacturer's FDA approved recommendations.
Note: Confirmation testing is performed on reactive results only if initial values fall within a designated range requiring additional confirmation.
No fasting required.
Estimated turnaround for results is 3 business days. If confirmation testing is required, the estimated time may be extended.
Hepatitis B surface antigen is the earliest indicator of the presence of acute infection. Also indicative of chronic infection. Test is useful in the differential diagnosis of hepatitis. Patients who are negative for HBsAg may still have acute type B viral hepatitis. There is sometimes a “core window” stage when HBsAg has become negative and the patient has not yet developed the antibody (anti-HBs). In cases with strong clinical suspicion of viral hepatitis, serologic testing should not be limited to detecting HBsAg, but should include a battery of tests to evaluate different stages of acute and convalescent hepatitis.
HBsAg; Confirmation of a positive result by a neutralization assay
****Hepatitis B Surface Antigen is included in the Hep B and C Profile Test.***
This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H or coenzyme R). It is recommended to stop biotin consumption at least 72 hours prior to the collection of specimen. Estimated turnaround for results is 3 business days. If confirmation testing is required, the estimated time may be extended.
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