Table 5.
Parameter values estimated from the logistic model describing the probability of a zero egg count
| Population |
δ0 (SE) |
δ1 (SE) |
δ2 (SE) |
δ3 (SE) |
| Baseline | 0.49* (0.24) |
-0.23 (0.27) |
-1.77*** (0.18) |
-1.01*** (0.14) |
| 1st re-infection | 0.91* (0.43) |
0.51 (0.40) |
-2.63*** (0.36) |
-2.00*** (0.33) |
| 2nd re-infection | 0.63 (0.41) |
1.07** (0.41) |
-2.56*** (0.38) |
-1.62*** (0.28) |
Parameter values were estimated by fitting equation (9) to the egg count data encoded in a binary fashion (positive or zero) using standard GLM procedures. Parameters refer to the following covariates: δ1: host age, δ2: the natural logarithm of female worm burden and δ3: the natural logarithm of female mean weight. Parameters significantly different from 0: * p-value < 0.05, ** p-value < 0.01, ***p-value < 0.001.