CD40LG and relapsing fever: Recently, Röttgerding et al. [12] developed two novel immunoassays (line immunoblot and ELISA) for IgM and IgG, employing complement-inhibiting protein (CihC) and glycerophosphodiester phosphodiesterase (GlpQ) of B. recurrentis as promising candidates for the diagnosis of louse-borne relapsing fever.