CD40LG and syphilis: An HIV panel, cerebrospinal fluid (CSF) analysis for amoeba, Cryptococcal antigens, herpes simplex virus (HSV) 1 and 2 IgM antibodies, HSV PCR, West Nile virus IgM and IgG antibodies, and Venereal Disease Research Laboratory (VDRL) screen for syphilis were also completed.