Figure 1.

The relationship between the per host net egg output and mean weight of female Ascaris lumbricoides. The relationship between the per host net egg output and the (centred, see main text) mean weight of female Ascaris in the baseline (A), 1^st (B) and 2^nd (C) re-infection populations. Triangles represent grouped mean egg outputs stratified by female Ascaris mean weight. Solid lines and circles represent the fitted values of the best fit polynomial functions (as determined by the likelihood-ratio statistic (LRS), see Table 3).