Table 5.

Effects of dietary algal protein supplementation and ETEC infection on BW and growth performance of weanling pigs¹

	Uninfected	ETEC-infected			Model P-value
Item	NC	PC	OA	SEM	DPI × TRT
BW, kg
DPI –10	5.98	5.97	5.90	0.281	0.977
DPI 0	7.14	7.16	7.37	0.281	0.814
DPI 9	11.8a	8.71b	9.32b	0.359	<0.001
–10 to 0 DPI
ADFI, g/d	542	531	525	11.2	0.593
ADG, g/d	116	118	147	26.3	0.696
G:F, g/kg	0.21	0.22	0.28	0.06	0.681
0 to 9 DPI
ADFI, g/d	595	636	733	27.7	0.128
ADG, g/d	458a	202b	276b	27.8	0.043
G:F, g/kg	0.77a	0.32b	0.38b	0.04	0.022
–10 to 9 DPI
ADFI, g/d	404	424	469	13.3	0.130
ADG, g/d	291a	160b	194b	8.54	0.016
G:F, g/kg	0.72a	0.38b	0.41b	0.01	0.005

¹Values represent least square means of 10 to 18 pigs per treatment. Pigs were removed from analysis for ADG, ADFI, and G:F if their BW measurement was deemed as a statistical outlier. All pigs were started on their assigned dietary treatment starting at –10 DPI. Experimental treatments: NC, sham-inoculated pigs receiving 1.0% wild-type algal protein; PC, ETEC-inoculated pigs receiving 1.0% wild-type algal protein; OA, ETEC-inoculated pigs receiving 1.0% OPN-enriched algal protein. Abbreviations: ETEC, enterotoxigenic E. coli; DPI, days postinoculation; TRT, treatment; ADG, average daily gain; ADFI, average daily feed intake; G:F, feed efficiency.

^abMeans without a common superscript letter differ (P < 0.05).