IGRA Interpretation: QuantiFERON/T-SPOT results do not differentiate between Latent and Active TB. Requires clinical correlation.
Positive
Infection Detected
Negative
Infection Unlikely
Indeterminate
Test Failure
Borderline
Equivocal (T-SPOT)
Note: IGRA is preferred for BCG-vaccinated patients and those unlikely to return for TST reading.