Figure 1.

Schematic illustrating transitions/interactions in the compartmental model for La Crosse virus disease. Subscripted 1, 2, and C denote parameters and state variables for the eastern tree-hole mosquito, Asian tiger mosquito, and host populations, respectively. State variables and parameters are described elsewhere (see Basic Model and Table A1, at http://www.clfs.umd.edu/biology/faganlab/disease-ecology.html). Black boxes indicate infected classes; gray boxes, exposed classes; and white boxes, susceptible/recovered classes. Dashed box with gray shading demarks the subset of transitions/interactions that define the native system before tiger mosquito invasion.