Fig. 4

Correlations of plasma IDO activities with the levels of on-ART HIV DNA. The plasma IDO activities in the two groups at baseline (a), and after ART (b). The correlations between the levels of on-ART HIV DNA and the plasma IDO activities both at baseline and after ART in the mono-HIV infected group and HIV/Tb co-infected group, respectively (c–f). All the data analyzed by non-parametric test. The blue dot represents mono-HIV infected patients and the orange dot represents HIV/Tb co-infected patients