Figure 5. Impact of temperature on the efficacy of different control programmes:

(1) targeting only the adult parasites by mass chemotherapy (achieved by doubling δ_P from the baseline value); (2) targeting only the snail intermediate vectors through molluscicide application (by doubling δ_J and δ_S); (3) improved sanitation (by halving λ_M); (4) combining intermediate vector control with mass chemotherapy and (5) combining intermediate vector control, mass chemotherapy and improved sanitation. The efficacy of control was measured as the Log₁₀ of the mean parasite abundance during the control phase divided by the mean abundance in the absence of control.