Collection Notes: Positive samples will be confirmed at an additional charge by reflex testing. Sample requirement must be met.
Clinical Utility: HBSAg is useful in identifying the presence of acute infection, and it can serve as an indicator of chronic infection when it is present for more than six months.
Serum (1 mL)
Ambient 24 Hours
Refrigerated 7 Days
Frozen 3 Months
EDTA plasma (1 mL)
EDTA
Ambient 8 Hours
Refrigerated 7 Days
Frozen 180 Days
Lithium heparin plasma (1 mL)
Ambient 24 Hours
Refrigerated 7 Days
Frozen 3 Months
Sodium heparin plasma (1 mL)
Ambient 24 Hours
Refrigerated 7 Days
Frozen 3 Months
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