Based on the nonlinear regression following the three-parameter sigmoid equation, the pathogenic models of infection with DIV1 on E. carinicauda via IM and PO were(2)MIM(t)=70.8±0.21+e−(4.76±2.49)[t−(2.64±0.21)](3)and MPO(t)=42.5±1.21+e−(0.82±0.51)[t−(3.83±0.87)],respectively. Here, MPO is linked to infection.