IGRA has been approved as an alternative in vitro test to diagnose Mycobacterium TB infection. This study aimed to assess the diagnostic value of TST in comparison with QFT assay to detect LTBI among Iranian children candidate for renal transplantation. This cross-sectional study was performed on 31 children who were candidate for renal transplantation admitted to Ali Asghar Children's Hospital and Rasoul Akram Hospital, Tehran, Iran, from 2013 to 2014. TST and QFT were performed for all patients. QFT was negative in all patients, while TST was positive only in one case. Both tests results were negative in 30 patients, yielding an accuracy rate of 96.7% for TST to diagnose LTBI when compared to QFT. In conclusion, compared to QFT, TST is still a valuable diagnostic tool with high accuracy rate for diagnosis of LTBI in children candidates for renal transplantation and can still be used as an accurate test for screening Mycobacterium TB infection.
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