Fig. 3

Percentage (mean and 95% confidence intervals) of infected snails after contact with five miracidia per snail for six hours. The miracidia had been previously exposed to either imidacloprid or diazinon for 2, 4 or 6 h at low concentrations (imidacloprid: 4.88 µg/L; diazinon: 1.05 µg/L); equal to 2–3.3 percent of the 6 h EC50 for miracidia) or at high concentrations (imidacloprid: 48.8 µg/L; diazinon: 10.5 µg/L; equal to 20–33 percent of the 6 h EC50). Asterisks indicate significant changes in infection success as compared to the non-contaminated control (** p < 0.01)