Establish evidence of infection/exposure to Bordetella pertussis, the causative agent of whooping cough.
Immediately following collection, mix sample by gently inverting 5 times
Gold serum separator (SST) tube
Ambient (preferred) - 14 days
Refrigerated - 14 days
Frozen - 14 days
Freeze/thaw cycles - stable x4
Enzyme-linked immunosorbent assay (ELISA)
Negative: < 0.95 index
Equivocal: 0.95 - 1.04 index
Positive: > 1.04 index