Fig. 8

Effect of control cost for domestic dog deworming: a–d Time series dynamics of infections, e–h The optimal control strategy. The solid and dashed curves correspond to the scenarios for \({C}_{3}=3\times {10}^{5}\) and \({C}_{3}=3\times {10}^{6}\), respectively. Here \({C}_{1}={C}_{2}={C}_{4}=3\times {10}^{5}\), the values of other parameters and the initial conditions are same with those in Fig. 6