<p>(<b>a</b>) Workers have a mean of 2.467±0.22 (S.E. n = 45; black bars) genotypes/host. (<b>b</b>) Queens have a mean of 3.65±1.03 (n = 37) genotypes/host. Statistically, the two distributions do not differ from one another, have the same means (glm with quasipoisson: t<sub>81</sub> = 1.323, p = 0.19), but different variances (see text). Compared to a zero-truncated Poisson expectation (lines), the observed distribution deviates for both castes (Kolmogorov-Smirnov for workers: D = 0.821, p<0.001; for queens: D = 0.714, p<0.001). In the graphs, the first bars refer to multiplicity = 1 (single infections).</p
