Fig. 1

Simplified life-cycle of Strongyloides venezuelensis and sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) gel images of excretory/secretory (E/S) proteins from parasitic females (Pfs) and infective third-stage larvae (iL3s). During the life-cycle of this species, the iL3 infects the host percutaneously and then migrates through the body to the small intestine, where it develops into an adult parasitic female that produces eggs parthenogenetically. The parasitic female secretes adhesive substances from the mouth, as shown in the inset picture. Parasitic female secretions were collected into two fractions (soluble and insoluble adhesive substances). Scale-bars: 100 μm