- Two patient visits required1
- Manual results entry
- Sensitivity 95%–98% in patients with proven active tuberculosis,2 specificity as low as 59% in BCG-vaccinated patients (high false positives)3
The CDC and other medical organizations prefer interferon-gamma release assays (IGRAs) for certain patient populations—here’s why you should, too
With a single visit and a highly accurate, objective result unaffected by the BCG* vaccine, IGRAs are the preferred method for many patient types compared to the century-old Mantoux tuberculin skin test (TST). When you’re ready to make the switch, only Quest Diagnostics offers a choice of tuberculosis (TB) blood tests: T-SPOT®.TB and QuantiFERON®- TB Gold Plus (QFT-Plus), both of which have a single-tube collection option.