Density-dependent effects on the weight of female Ascaris lumbricoides infections of humans and its impact on patterns of egg production

Table 5 Parameter values estimated from the logistic model describing the probability of a zero egg count

Population	δ ₀ (SE)	δ ₁ (SE)	δ ₂ (SE)	δ ₃ (SE)
Baseline	0.49* (0.24)	-0.23 (0.27)	-1.77*** (0.18)	-1.01*** (0.14)
1^st re-infection	0.91* (0.43)	0.51 (0.40)	-2.63*** (0.36)	-2.00*** (0.33)
2^nd 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.

ISSN: 1756-3305