HEPATITIS B SURFACE ANTIGEN (HBG)
: HBSAG, HBG
: Negative, positive or indeterminate
: Red top (no gel)
: Serum only
: Red top microtainer (1 mL) x 2 or 3
: 400 uL (includes repeat testing)
: 150 uL (no repeat)
: Allow to clot, store refrigerated (2-8 C)
: Room temperature (15-30 C): 24 hours; 2-8 C: up to 6 days; Longer than 6 days: remove serum from clot and store at -20 C
Reasons for Rejection
: Same assay within 4 days, obvious microbial contamination
: Monday - Friday
: Morning and afternoon
: 2 hours to 2.5 days
: Confirmation by neutralization will be performed when indicated
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