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The aim of this study was to analyze the combination of three kinds of in-house IFN- ELISPOT using peptide A53 and peptide mixtures (E6 + E7 and E6 + E7 + C14) with tuberculin skin test (TST) to detect latent TB infection (LTBI) in China. A total of 788 healthy people were recruited and analyzed by three kinds of IFN- ELISPOT, 581 of them had TST results, of which 147 samples were also compared with the T-SPOT.TB test. The positive detection rates for T-SPOT.TB and three kinds of IFN-doi:10.4236/abb.2012.33036 fatcat:5gxaqbtpcrghvaj7yt2wdyv42a