Table 2.

Live weight change and feed conversion ratio in experimental birds before and after inoculation with Salmonella enteritidis and Escherichia coli on 28 d of age.

Item	Dietary treatment1			SEM	P-value
	NC	PC	PFA
d 1 to 28 (Pre-challenge period)
ADG, g/d	41.9	42.5	42.4	0.24	0.655
ADFI, g/d	58.7	59.9	59.7	0.46	0.523
Feed conversion ratio	1.398	1.41	1.407	0.013	0.917
d 29 to 39 (Post-challenge period)
ADG, g/d	72.4	76.3	82.6	8.45	0.075
ADFI, g/d	169.1c	160.1b	153.1a	1.49	0.0001
Feed conversion ratio	2.336b	2.099b	1.853a	0.072	0.003
d 1 to 398 (Overall period)
Empty body weight, g	2,016.5a	2,074ab	2,141.8b	23.1	0.04
Feed intake, g	91.8b	89.9b	87.7a	0.52	0.002
Feed conversion ratio	1.816b	1.729ab	1.632a	0.026	0.006

^a,b,c Within a row, means with dissimilar letters varied significantly (P < 0.05).

¹NC is negative control, the basal diet; PC is positive control, the basal diet supplemented with bacitracin methylene disalicylate, 500 mg/kg; PFA is the basal diet supplemented with a phytogenic feed additive, 150 mg/kg. Means of 8 replicate cages (n = 4 birds in each cage).