The aim of this study was to evaluate six different antigenic fractions from Strongyloides venezuelensis parasitic females for the immunodiagnosis of human
strongyloidiasis. Soluble and membrane fractions from S. venezuelensis parasitic females were prepared in
phosphate-buffered saline (SSF and SMF, respectively), Tris-HCl (
TSF and TMF, respectively), and an alkaline
buffer (ASF and AMF, respectively). Serum samples obtained from patients with
strongyloidiasis or, other
parasitic diseases, and healthy individuals were analyzed by
enzyme-linked
immunosorbent assay (ELISA). Soluble fractions SSF,
TSF, and ASF showed 85.0%, 75.0%, and 80.0% sensitivity and 93.1%, 93.1%, and 87.5% specificity, respectively. Membrane fractions SMF, TMF, and AMF showed 80.0%, 75.0%, and 85.0% sensitivity, and 95.8%, 90.3%, and 91.7% specificity, respectively. In conclusion, the present results suggest that the fractions obtained from parasitic females, especially the SSF and SMF, could be used as alternative
antigen sources in the serodiagnosis of human
strongyloidiasis.