. Author manuscript; available in PMC: 2009 Apr 10.

Published in final edited form as: Parasitology. 2009 Mar 5;136(5):567–577. doi: 10.1017/S0031182009005617

Table 2.

The effects of primary infections on S. ratti survivorship and per capita fecundity

	Term	Coefficient	LR test^a	P value^a
Survivorship ^b	Intercept	−0.605 ± 0.094	-
	Secondary dose (750 iL3s)	−1.17 ± 0.17	34.38	<0.001
	Time (Day 21 p.s.i.)	−0.624 ± 0.106	55.13	<0.001
	Primary dose (30 S. ratti iL3s)^c	−0.385 ± 0.126
	Primary dose (750 S. ratti iL3s)^c	−2.54 ± 0.21	168.13	<0.001
	Secondary dose × Time	−3.96 ± 0.32	198.50	<0.001
Fecundity ^d	Intercept	2.27 ± 0.31
	Secondary dose (750 iL3s)	0.87 ± 0.18	21.01	<0.001
	Time (Day 21 p.s.i.)	−3.45 ± 0.63	39.40	<0.001
	Primary spp. (N. brasiliensis)	0.375 ± 0.366
	Primary spp. (S. venezuelensis)	0.755 ± 0.366
	Primary spp. (S. ratti)	−0.157 ± 0.367	13.18	<0.01
	Time × Primary spp. (N. brasiliensis)	2.13 ± 0.70
	Time × Primary spp. (S. venezuelensis)	2.04 ± 0.70
	Time × Primary spp. (S. ratti)	3.15 ± 0.82	15.31	<0.01

Likelihood ratio test presented for deletion of individual terms. For factors, tests refer to simultaneous deletion of all factor levels.

2 × log-likelihood = −318.31 with 50 residual degrees of freedom, overdispersion parameter k = 29.6 ± 14.5.

Factor levels for primary dose were grouped such that animals receiving either PBS, N. brasiliensis or S. venezuelensis in a primary infection were compared with those receiving 30 and 750 S. ratti iL3s as a primary infection.

2 × log-likelihood = −560.87 with 40 residual degrees of freedom, overdispersion parameter k = 2.83 ± 0.63.