SDHD and leprosy: There was a significant positive correlation between the levels of IgG anti-STAg and both IgM/IgG anti-PGL-1 in T. gondii seropositive individuals, but these correlations were weak [IgM (r = 0.2609)/ IgG (r = 0.3026)] what may mean that antibody levels are not related to the risk of developing leprosy (Fig. 3A and B).