Immediately following collection, mix sample by gently inverting 5 times
Gold serum separator (SST) tube
Refrigerated (preferred) - 7 days
Frozen (OK)
Indirect Chemiluminescence Immunoassay (CLIA)
Negative: <9.0 Index value (presumed not immune)
Equivocal: 9.0 - 10.9 Index value (repeat in 1 - 2 weeks)
Positive: ≥11.0 Index value (presumed immune)