Table 3
Effects of dietary supplementations of 100 ppm of ZnO without (BASAL) or with 120 ppm of apramycin (ANTIBIO), 2,500 ppm of ZnO (HIGH), and 100 ppm of the lipid-encapsulated ZnO (LE) on growth performance of weanling pigs challenged with 5 × 10⁸ cfu of ETEC K88

Item	BASAL	ANTIBIO	HIGH	LE	SEM	P-value
Before the ETEC K88 challenge (d −5 to d 0)¹
Initial wt, kg	7.06	6.78	6.91	6.57	0.28	0.65
Final wt, kg	7.88	7.56	7.74	7.40	0.31	0.72
ADG, g	165	156	166	166	11	0.91
After the ETEC K88 challenge (d 0 to d 7)¹
Final wt, kg	8.43	8.32	8.66	8.36	0.36	0.91
ADG, g	78^b	109^ab	132^a	137^a	14	0.03