PTPN22 and Mycobacterium infection: In Caucasians, the result indicated that PTPN22-C1858T polymorphism correlates the susceptibility to mycobacterial infection [C versus G: OR = 1.02 (95% CI: 0.22–4.70, PH = 0.001); CT versus CC: OR = 1.03 (95% CI: 0.21–4.97, PH = 0.001); CT+TT versus CC: OR = 1.03 (95% CI: 0.21–4.97, PH = 0.001)] (Table 2).