Evaluation of a modified interferon-gamma release assay for the diagnosis of latent tuberculosis infection in adult and paediatric populations that enables delayed processing.

The objective of the study was to evaluate the specificity of a modified interferon-gamma release assay (IGRA) procedure that allows storage of blood samples for up to 32 h before processing. A total of 116 subjects were enrolled in the study. Two blood samples were collected from each volunteer; 1 specimen was processed within 8 h and analyzed using the T-SPOT更多