Table 1. Maximum likelihood estimates of the parameters in the Hurdle Negative Binomial model.

For infection intensity (hurdle model)
Parameter	Estimate	Std. Error	z value	Pr(>|z|)
Intercept	-1.8322	0.2750	-6.66	2.7e-11	***
LogGto	0.9887	0.0577	17.15	< 2e-16	***
MOI	0.2358	0.0970	2.43	0.0151	*
interaction	-0.0631	0.0212	-2.97	0.0029	**
Dispersion	0.66957	0.027334
For infection prevalence (logit link function)
LogGto	0.2440	0.0192	12.69	< 2e-16	***
MOI	-0.1574	0.0447	-3.53	4.2e-04	***
interaction	0.0234	0.0133	1.76	0.078	ns

LogGto, logged-transformed gametocyte density; MOI, multipicity of infection; Interaction for interaction between LogGto and MOI. The dispersion parameter that is accommodated in the HNB model reflects over-dispersion of parasites. Z value is a Student statistics. Significant codes

'***' <0.001

'**' <0.01

'*' <0.05; 'ns' ≥0.05.