Figure 2. Individual Interferon-gamma (IFN-γ) responses among 96 pulmonary TB (PTB) patients and 110 healthy community adults (HCA) stratified by HIV status and in a group of 59 healthy adults at high risk of M.tuberculosis exposure (54 recent family contacts and 5 health care workers).

Short bars, median level of QFT-GIT response in each group. Footnotes: TB: tuberculosis; HIV: human immunodeficiency virus; LTBI: latent tuberculosis infection.