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Table 3 Diagnosis of Mtb infection by culture method and QFTGIT at cut-off value recommended by the manufacturer in HIV-seropositive study participants (n = 26)

From: Performance of QuantiFERON-TB Gold In-Tube (QFTGIT) for the diagnosis of Mycobacterium tuberculosis (Mtb) infection in Afar Pastoralists, Ethiopia

   Culture method Diagnostic performance
QFTGIT/cut-off value (IU/ml)   Number of positive Number of negative Sensitivity(%) Specificity(%)
≥ 0.35* Number of positive 5 10 83.3 50.0
  Number of negative 1 10   
  1. *Manufacturer's recommended cut-off value.