System variable | Symbols |
---|---|
SWB prevalence strata: | |
k Δw ≤ w < (k + 1)Δw with worm burden increment Δw | \( \begin{array}{c}\hfill \left\{{h}_k(t):k=0,1,\dots \right\}\hfill \\ {}\hfill {\displaystyle {\sum}_k{h}_k=1}\hfill \end{array} \) |
Demographically structured SWB: | |
Child | h _{ k } ^{C} (t) |
Adult | h _{ k } ^{A} (t) |
Population densities per unit habitat: | |
Human | H (t) |
Snail (susceptible, infected, patent) | N(t) = x(t) + y(t) + z(t) |