HPGDS and parasitic infectious disease: We have also previously shown that recombinant TcRpL7a in fusion with glutathione S-transferase (GST) or a synthetic peptide containing five TcRpL7a repeated motifs may be employed as targets in serological tests since they are strongly recognized by antibodies present in sera from patients with CD but not from patients with other parasitic diseases (Pais et al., 2008).