Table 3.
Parasite | Model Fit | Significant parameters | Value and 95% CIs | Parameter type | P value |
---|---|---|---|---|---|
E. multilocularis | Binomial GLM (logistic) | Age | 0.82(0.65–0.99) | Odds ratio | 0.043 |
E. multilocularis | Zero-inflated Negative binomial GLM | Age (zero-inflated) | 1.28 (1.01–1.62) | Odds ratio | 0.042 |
k | 0.26(0.19–0.37) | ||||
Dipylidium caninum | Negative binomial GLM | Age | 0.57 (0.37–0.81) | Incidence rate Ratio | <0.0001 |
Presence of E. multilocularis | 3.81(1.35–10.16) | Incidence Rate Ratio | 0.008 | ||
Presence of T. leonina | 0.13(0.02–0.80) | Incidence Rate Ratio | 0.028 | ||
k | 0.13(0.08–0.17) |
Incidence Rate Ratio. This is the parameter in a negative binomial generalised linear model. For a continuous variable such as age it is the proportional change in parasite count for each year. Thus, for each 1 year increase in age the abundance of D. caninum parasites decreases by 57%. For a binomial variable such as presence of E. multilocularis it is the ratio of D. caninum parasite counts between those foxes infected with E. multilocularis and those non-infected.