Comparison of worm distribution patterns for a negative binomial-based MWB system <i>vs</i>. a SWB system.

<p>Here, all SWB distributions (right-hand panels) are produced from an uninfected source . (a) NB-MWB with fixed mean and increasing k ( is the limiting Poisson case); (b) Equilibrium SWB distribution for uninfected source with FOI (mean) , and varying demographic parameter (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0115875#pone.0115875.e140" target="_blank">equation (13</a>)); plays the role of aggregation k for NB, with small corresponding to large (infinite) k. Panels (c−d) Poisson distributions with different means, (left panel) <i>vs.</i> SWB distributions with different (right panel) exhibit striking similarity. Panels (e)−(f) compare infectious prevalence for the two models as a function of NB-MWB <i>w</i> or SWB .