Serology confirmed syphilis (rapid plasma regain [RPR] test 1:2; Treponema pallidum particle agglutination assay [TPPA] > 1:1280; syphilis antibody screening test IgG, IgM, IgA version Ultra Diapro® reactive; and treponemal membrane protein A enzyme-linked immunosorbent assay IgM reactive). This evidence concerns the gene CD40LG and syphilis.