Table 3. The body weight, body weight gain, feed conversion ratio and feed intake of Ross 708 male broilers fed riboflavin and Bacillus subtilis and challenged with coccidiosis from d 14–41

Riboflavin	Bacillus	Coccidiosis	Body weight (kg)			Body weight gain (kg)				Feed conversion ratio				Feed intake (kg)
			d 28	d 35	d 41	d 14–28	d 28–35	d 35–41	d 0–41	d 14–28	d 28–35	d 35–41	d 0–41	d 14–28	d 28–35	d 35–41	d 0–41
0.75			1.34	2.05	2.73	1.003	0.702	0.685	2.69	1.510	1.725	1.789	1.611	1.527	1.208a	1.226	4.384
6.6			1.33	2.03	2.68	0.987	0.700	0.653	2.64	1.524	1.722	1.806	1.615	1.521	1.198a	1.182	4.329
20			1.34	2.03	2.71	1.003	0.688	0.678	2.67	1.518	1.699	1.775	1.603	1.520	1.165b	1.222	4.328
SEM1)			0.011	0.015	0.018	0.0097	0.0081	0.0093	0.019	0.0030	0.0110	0.0150	0.0180	0.0130	0.0109	0.0166	0.0296
	No		1.35	2.05	2.72	1.007	0.698	0.675	2.68	1.518	1.716	1.805	1.615	1.535	1.194	1.225	4.384a
	Yes		1.33	2.02	2.69	0.989	0.695	0.669	2.65	1.517	1.714	1.775	1.604	1.510	1.187	1.194	4.310b
	SEM		0.009	0.012	0.015	0.0080	0.0066	0.0077	0.016	0.0081	0.0128	0.0210	0.0053	0.0107	0.0090	0.0130	0.0242
		Non-challenge	1.39a	2.08a	2.73a	1.063a	0.680b	0.657	2.70a	1.477b	1.742a	1.801	1.603	1.575a	1.179	1.200	4.380
		Challenge	1.27b	1.98b	2.67b	0.932b	0.712a	0.686	2.63b	1.557a	1.687b	1.784	1.616	1.468b	1.202	1.220	4.314
		SEM	0.010	0.012	0.015	0.0078	0.0066	0.0077	0.015	0.0082	0.0167	0.0240	0.0050	0.0105	0.0104	0.0148	0.0242
Riboflavin × Coccidiosis
0.75		Non-challenge	1.43	2.11	2.78	1.085	0.687	0.668a	2.74	1.468	1.748	1.852a	1.612	1.596	1.196	1.239	4.457
0.75		Challenge	1.26	1.98	2.68	0.922	0.717	0.700a	2.64	1.551	1.702	1.724c	1.610	1.457	1.220	1.214	4.311
6.6		Non-challenge	1.38	2.07	2.69	1.046	0.692	0.618b	2.65	1.484	1.730	1.835ab	1.606	1.564	1.184	1.147	4.318
6.6		Challenge	1.28	1.99	2.67	0.929	0.707	0.687a	2.63	1.565	1.713	1.775abc	1.624	1.478	1.212	1.217	4.340
20		Non-challenge	1.40	2.06	2.75	1.060	0.663	0.686a	2.71	1.480	1.750	1.727bc	1.591	1.568	1.157	1.215	4.365
20		Challenge	1.29	2.00	2.67	0.945	0.713	0.670a	2.63	1.556	1.648	1.823abc	1.615	1.472	1.173	1.228	4.290
SEM			0.016	0.021	0.026	0.0137	0.0114	0.0132	0.022	0.0140	0.0223	0.3700	0.0089	0.0183	0.0155	0.0230	0.0419
p-value
Riboflavin			0.532	0.660	0.186	0.436	0.418	0.048	0.187	0.597	0.442	0.727	0.402	0.924	0.020	0.121	0.306
Bacillus			0.079	0.142	0.142	0.114	0.763	0.549	0.140	0.976	0.909	0.070	0.152	0.101	0.585	0.106	0.034
Coccidiosis			< .0001	< .0001	0.004	< .0001	0.001	0.011	0.004	< .0001	0.004	0.328	0.075	< .0001	0.076	0.304	0.056
Riboflavin × Bacillus2)			0.607	0.872	0.665	0.871	0.906	0.433	0.667	0.291	0.856	0.107	0.554	0.768	0.996	0.915	0.910
Riboflavin × Coccidiosis			0.098	0.190	0.239	0.149	0.334	0.009	0.239	0.965	0.165	0.013	0.333	0.307	0.931	0.130	0.143
Bacillus × Coccidiosis2)			0.356	0.685	0.992	0.276	0.621	0.504	0.988	0.308	0.339	0.362	0.858	0.678	0.085	0.451	0.979
Riboflavin × Bacillus × Coccidiosis2)			0.305	0.627	0.640	0.305	0.379	0.916	0.635	0.234	0.639	0.790	0.177	0.400	0.194	0.581	0.337

n = 8.
Means of non-significant interactions are not listed.
Means in a column not sharing a common superscript are different (p < 0.05).