Appendices

■107

(a)

(b)

Figure 11: The density of (a) asexual parasites (b) gametocytes as a function of age simu-

lated using the density model [43], for different parasite influx with rb = 0.7, a = 0.3, β =

0.005, γ = 0.5, T = 1 and δ = 0.5.

seemed to be better for studying parasite densities. As suggested by Aron [43], it could

also be that each model is suitable for different ranges of infection rates. A density model

could be appropriate when infection rates are so high in the sense that one does not have