Figure 3.

A preliminary framework for a multihost, multiparasite transmission model of the zoonotic hybrid S. haematobium/S. bovis system, involving cattle, sheep, goats and humans definitive hosts. Definitions of example parameters and factors influencing these parameters are given in Table 1. For clarity, the “worm death rate” parameter μ _i,j and the “snail death rate” parameters γ _s,j are not shown but would be included, and likewise all the possible mating probabilities for female worms in the human host population are not shown (ϕ _{i,j_j}), but would all need to be included in such a model