The anti-PGL-I antibody levels were significantly increased post-infection and good discriminatory performance was obtained for anti-PGL-I IgM ELISA and -UCP-LFA with ROC-AUC values of 0.993 (p < 0.0001) and 1.000 (p < 0.0001) (Figure 5A and Table 1A). This evidence concerns the gene CD40LG and infection.