Mathematical Modeling of Echinococcosis in Humans, Dogs, and Sheep

Table 1

Definitions of variables.

Variables	Definitions
, , , and	Number of susceptible, exposed, infected, and removed humans, respectively
, , and	Number of susceptible, exposed, and infected dogs, respectively
, , and	Number of susceptible, exposed, and infected sheep, respectively
	The concentration of Echinococcus granulosus’ eggs in the environment
, , and	Total number of dogs, sheep, and humans, respectively