Fig. 1

Immobilization of S. mansoni miracidia after exposure to imidacloprid (A, B) and diazinon (C, D) for 6 and 12 h, respectively. Data points represent survival from different replicate tests, solid lines show the fitted concentration—response relationships, and the shaded areas correspond to the 95% confidence intervals. The EC50 (black dot) is shown together with the upper and lower limit of its associated 95% confidence interval