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. 2017 Jun;21(6):690–696. doi: 10.5588/ijtld.16.0764

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© 2017 Telisinghe et al.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.

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Figure 2. — Dot plot of TB1 and TB2, minus the nil background IFN-γ concentration among pulmonary TB patients tested using the QuantiFERON^®-TB Gold Plus assay, stratified by HIV status (n = 108 with known HIV status). A) HIV-negative pulmonary TB patients (n = 40); B) HIV-positive pulmonary TB patients (n = 68). Each dot represents the TB1 minus the nil background IFN-γ concentration (on the left) and the TB2 minus the nil background IFN-γ concentrations (on the right), per person. ------ = IFN-γ concentration of 0.35 IU/ml; ++++ = median IFN-γ concentration in IU/ml. IU = international unit; IFN-γ = interferon-gamma; TB = tuberculosis; HIV = human immunodeficiency virus.