Table 6.

Effects of raising system and narasin on mRNA expression of ileum immune factors of broilers.

Treatment		Lesion score	IL-1β	TNF-α	IL-8	IFN-γ
Main effect
System	FL	0.30	0.97a	1.06	1.32	0.94a
	MC	0.32	0.71c	1.06	1.43	0.45c
	PN	0.30	0.84b	1.16	1.39	0.79b
Anticoccidial	+	0.29	0.83	1.00b	1.32	0.75
drug	−	0.33	0.85	1.19a	1.43	0.71
P-value	System	0.931	0.001	0.504	0.629	<0.001
	Narasin	0.290	0.777	0.030	0.222	0.511
	Interaction	0.407	0.002	0.510	0.002	0.068

^a,bWithin a row, numbers with different superscripts differ statistically at P < 0.05.

Abbreviations: FL, flooring litter rearing; MC, multilayer cage rearing; PN, plastic net rearing.

n = 8 replications.