Fig. 4.

Demonstration of IgG antibody reactivity with proteins in E/S products from iL3, pF and flS using sera from rats (A) and humans (B). ELISA titers—shown as box plots and quartiles—obtained (A) for 10 sera before (pre) and 32 days after (post) infection with S. ratti and (B) for two nonexposed Europeans not exposed to S. stercoralis and 10 Africans exposed to or infected with S. stercoralis. The antibody titers differed significantly (Mann-Whitney U test: p < 0.05 - p < 0.001) within the two respective groups of rat sera (for iL3: p < 0.001, pF: p < 0.001 and for fls: p < 0.05) and human sera for E/S products from iL3 and pF and flS (p < 0.05 for all).