Table 1.

Interpretation of the model (1)

Parameter	Interpretation
a(t)	the rate of incidence for a single definitive host at unit density of infected snails at time t
b(t)	the rate at which an infected definitive host causes snail infections at time t
g	the recovery rate for definitive host infections
Δ	the density of snails
Σ	the density of definitive hosts
μ	per capita removal rate of infected snails

Abbreviations: P, the prevalence of infection in the definitive host population; y, the proportion of infected snails