Figure 2From: Correlation between tuberculin skin test and IGRAs with risk factors for the spread of infection in close contacts with sputum smear positive in pulmonary tuberculosis Number of positive results obtained by TST and both IGRA tests (T-SPOT.TB and QFN-G-IT) in adults and children, including information in each case of the origin of the contact: familial (■) or from the community (□). Back to article page