TABLE 2.

Summary of the best models listed in Table 1 to describe fertility, the number of colonized worms, and bacterial load in the progeny^a

Modelb	Effects	Estimate	SE or variancec	t-value, Z-value, or SD	P value
A	Fixed
	Intercept	50.37	5.25	9.58 (t)	<0.001
	Bacteria (S. enterica)	35.85	6.77	5.35 (t)	<0.001
B	Fixed
	Intercept	−2.41	0.75	−3.23 (Z)	<0.01
	Source (colonized mother)	6.24	1.20	5.21 (Z)	<0.001
	Bacteria (S. enterica)	−1.50	0.92	−1.63 (Z)	0.1
	Worm (CB4856)	1.81	0.66	2.76 (Z)	<0.001
	Source (colonized mother): bacteria (S. enterica)	−3.97	1.45	−2.75 (Z)	<0.001
	Random
	Plate (intercept)		8.23 (v)	2.87 (SD)
C	Fixed
	Intercept	−1.63	0.31	−5.27 (Z)	<0.001
	Source (colonized mother)	1.70	0.33	5.10 (Z)	<0.001
	Bacteria (S. enterica)	−0.81	0.32	−2.51 (Z)	<0.05
	Random
	Plate (intercept)		1.87 (v)	1.37 (SD)

^aAbbreviations: v, variance; t, t-value; Z, Z-value, SD, standard deviation.

^bA, fertility (113 plates); B, no. of colonized worms (967 observations grouped in 113 plates); C, bacterial load in progeny (419 observations in 76 plates).

^cAll values in this column are SE unless indicated as variance (v).