Infectious and inflammatory workup, including serum rapid plasma regain (RPR) and Treponema pallidum particle agglutination (TP-PA), toxoplasmosis IgG/IgM, Bartonella IgG/IgM, Rickettsia IgG/IgM/Titer, West Nile IgG/IgM, QuantiFERON-Gold, ANCA, anti-nuclear antibody (ANA), angiotensin converting enzyme (ACE), lysozyme, chest x-ray and blood bacterial and fungal cultures, were negative except for rickettsial testing with positive IgM and IgG titers for R. typhi. The gene discussed is ACE; the disease is toxoplasmosis.