Monthly follow-ups of interferon-{gamma} release assays among healthcare workers in contact with TB patients

Chest, 05/07/2012

Fluctuation in Interferon–γ (IFN–gamma)–release assays (IGRAs) findings was common when health care workers in contact with TB patients were tested monthly. This could be a result of poor reproducibility of the assay, repeated infection and true reversion, or periodic secretion of antigens from M. tuberculosis.

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