Infectious origin through microbiological test revealed the following: Enterovirus was negative; Herpes simplex virus IgM, negative; CMV IgG, positive; CMV IgM, negative; Epstein-barr VCA IgM, negative; anti-EBNA IgG, positive; Parvovirus IgM, negative; Parvovirus IgG, positive; IgM, negative; Adenovirus, negative; the hepatitis panel (HBsAg, anti-HB core, anti-HVA, anti-HVC, and anti-HVE), negative; anti-HIV, negative; Toxoplasma IgG, positive; Toxoplasma IgM, negative; and Syphilis, negative. This evidence concerns the gene CD40LG and syphilis.