Provides evidence of an existing or past streptococcal infection
Immediatley following collection, mix sample by gently inverting 5 times
Gold serum separator (SST) tube
Ambient (preferred) - 9 days
Refrigerated - 14 days
Frozen - 14 days
Freeze/thaw cycles - stable x3
Immunonephelometry
< 1 year: not established
1 - 6 years: < 78 U/mL
7 - 17 years: ≤ 170 U/mL
≥ 18 years: ≤ 120 U/mL