Table 3.

The growth performance of AA broilers on d 21.

Items	Group				SEM	Main effect				P value
	CON	GOD	Cp	Cp + GOD		Infection		GOD		Infection	GOD	Infection × GOD
						-	+	-	+
14-21d
ADG,g/d	35.98	35.87	32.56	31.42	0.827	35.92a	31.99b	34.27	33.64	0.018	0.690	0.744
ADFI,g/d	56.79	57.48	53.77	52.20	0.863	57.14a	52.99b	55.28	54.84	0.016	0.788	0.488
FCR	1.58	1.60	1.65	1.66	0.027	1.59	1.65	1.62	1.63	0.168	0.943	0.741
21-35d
ADG,g/d	61.60	63.31	63.52	66.03	1.521	62.46	64.77	62.56	64.67	0.471	0.511	0.900
ADFI,g/d	100.32	103.81	100.89	105.77	1.308	102.06	103.33	100.60	104.79	0.633	0.123	0.793
FCR	1.63	1.64	1.59	1.60	0.028	1.63	1.60	1.61	1.62	0.404	0.995	0.877
1-35d
ADG,g/d	38.66	39.52	38.76	39.52	0.635	39.09	39.14	38.70	39.52	0.972	0.550	0.970
ADFI,g/d	61.37	62.97	60.68	62.31	0.595	62.17	61.50	61.02	62.64	0.584	0.194	0.989
FCR	1.59	1.59	1.57	1.58	0.017	1.59	1.57	1.58	1.59	0.544	0.897	0.904

Abbreviations: ADG, Average daily gain; ADFI, Average daily feed intake; FCR, Feed conversion ratio; Cp, Clostridium perfringens; GOD, glucose oxidase; CON, The control group; GOD, The GOD group; Cp, The Cp challenge group; Cp + GOD, The Cp challenge group fed with GOD.

^a–bMeans in the same row without the same superscript differ significantly (P < 0.05). SEM means standard error of the mean. “+” means challenge or add. (n = 7).