CD40LG and infection: The patient was tested for various infections, including HIV (anti-HIV), Coxiella burnetii (IgM and IgG), brucellosis (Brucella species IgM and IgG), Leishmaniasis (Leishmania infantum IgM and IgG), and Borrelia burgdorferi (anti-B burgdorferi IgM and IgG).