97 children with different forms of TB and latent TB infection were examined at the University children hospital for pulmonary diseases – Sofia. The children were tested with TST and QFT. Only 9,3% of the children had negative TST and 72,2% reacted with sizes of the infiltrate above 15mm. With QFT 55,7% had positive results. We discovered that the largest share of the children who reacted to both TST и QFT is in the highest age groups. TST sensitivity is 77,7%, while forQFTis 88,9%, which shows greater diagnostic possibilities of QFTGIT. WithQFT 21(55,3%) of the children without BCG scar reacted positively and 33(55,9%) of the children with BCG scar reacted positively, which supports the statement for the efficacy ofQFTintube in cases with compulsory BCG vaccination.In conclusion, we think that QFT GIT together with TST increases the diagnostic possibilities in children with suspected TB disease, as well as for therapy control
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