Figure 1.

(a) Conceptual schematic of the mechanistic model for Salmonella dynamics in urbanized white ibis. Circles represent state variables (S = susceptible, I_t = transiently shedding, I_a = actively colonized, e = environmental prevalence), solid lines represent transitions and dashed lines represent exposure pathways or routes of pathogen shedding into the environmental pool. (b) The four model scenarios for varying assumptions about contact-based transmission and the contribution of non-ibis sources. Parameter definitions are provided in table 1. (Online version in colour.)