CD40LG and syphilis: Toxoplasma virus immunoglobulin M (IgM), cytomegalovirus IgM, herpes simplex virus IgM, hepatitis B virus (HBs antigen), hepatitis C virus (HCV antibody), varicella-zoster virus IgM, parvovirus B19 IgM, and syphilis (TP antibody) were all negative.