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  • Title: QuantiFERON-TB Gold In-Tube test (QFT-GIT) for the screening of latent tuberculosis in recent immigrants to Italy.
    Author: Saracino A, Scotto G, Fornabaio C, Martinelli D, Faleo G, Cibelli D, Tartaglia A, Di Tullio R, Fazio V, Prato R, Monno L, Angarano G.
    Journal: New Microbiol; 2009 Oct; 32(4):369-76. PubMed ID: 20128443.
    Abstract:
    To evaluate the agreement between QuantiFERON-TB Gold In-Tube test (QFT-GIT) and tuberculin skin test (TST) for the screening of latent tuberculosis infection (LTBI) in recent immigrants to Italy, 279 subjects were submitted to concomitant TST and QFT-GIT. The agreement was analyzed using k statistics. A total of 72/279 (25.8%) individuals were TST positive, while 107/279 (38.3%) were QFT-GIT positive. The overall agreement between QFT-GIT and TST was 70.9%, with k statistic of 0.35. Using different TST and QFT-GIT cut-offs, the best concordance value was obtained for QFT-GIT at > 2.64 IU/ml and TST at > 10mm (k = 0.409). Discordant results were found for 58 subjects (21%) with QFT-GIT positive/TST negative and 23 (8%) with QFT-GIT negative/TST positive. A high amount of discordance QFT-GIT+/TST- was described. QFT-GIT might increase the identification of LTBI cases among recent immigrants.
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