The whole blood interferon-ƒÁ assay, QuantiFERON(R) TB-2G (QFT) was undertaken in 89 children with a risk of latent tuberculosis (TB) infection (LTBI) or active TB disease to estimate the efficacy of this assay for the diagnosis of LTBI and active TB disease in children. QFT tested before starting anti-TB chemotherapy was positive in all five cases with active TB disease (2-16 years),
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