Abstract
PURPOSE: QuantiFERON TB-Gold In Tube (QFT) has emerged as an alternative test to the tuberculin skin test (TST) to diagnose latent tuberculosis infection (LTBI). Household (HH) contacts of TB patients are at great risk for latent LTBI. We compared the performance of the whole blood IFN-γ test with TST in HH contacts of hospitalized TB patients in a Brazilian city with a high incidence of TB.
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