Fig. 6

Validation of model behaviour. Panel a records the mean worm burden and 95 % credible intervals for the predicted mean intensity of infection by age class (1 = 0–5 years; 2 = 5–10 years; 3 = 10–20 years; 4 = 20–30 years; 5 = 30-45years and 6 = 45–70 years), plotted against the observed mean values recoded in the raw data from the Elkins et al. study of Ascaris reinfection [19]. Graph b records the original baseline data as mean intensity of infection by age group and the model fit carried out to estimate the key parameters (k, γ, β_i, and R₀). T