Figure 1. Reactivity of sera (expressed in ELISA OD at 450 nm) from immunocompetent individuals with S. stercoralis infection (Group 1; Strg), healthy (Group 2; Hlth), with other parasitosis [Group 3, including those infected with A. lumbricoides (Asca), T. trichiura (Tric), E. vermicularis (Ente), hookworms (Hook), H. nana (Hyme), S. mansoni (Schi), and G. intestinalis (Giar)], and immunocompromised with strongyloidiasis (Group 4; Strg IC) against the surface cuticle antigens extracted with CTAB detergent (L3-CTAB) or the soluble somatic extract (L3-SSE) from infective larvae of S. venezuelensis by ELISA. Each graphic shows the cut-off values (Y axis).