Figure 2
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2334-6-105/MediaObjects/12879_2006_Article_369_Fig2_HTML.jpg)
Plasma cytokine levels. Plasma levels of IFN-γ and IL-18 in pulmonary tuberculosis patients were quantified using ELISA assay. Patients infected with Beijing and non-Beijing strains showed similar levels of IFN-γ (p = 0.994) and IL-18 level (p = 0.341). The bars indicate the log median levels in each group.