Table 9.

Impact of prebiotics with or without heat stress on hemagglutination inhibition (HI) antibody titers against Newcastle disease (ND) and avian influenza (AI) vaccines.

Time	Groups
	Control HI titers (Log2)	Prebiotics HI titers (Log2)	Heat stress HI titers (Log2)	Heat stress prebiotics HI titers (Log2)
Week 2 (ND)	2.22 ± 0.147	2.667 ± 0.166	–	–
Week 3 (Al)	3.778 ± 0.277a	5.333 ± 0.235b	–	–
Week 4 (ND)	1 ± 0a	1.778 ± 0.147b	0.777 ± 0.147a,c	1.556 ± 0.175b,d
Week 5 (ND)	1.222 ± 0.147	1.444 ± 0.175	0.888 ± 0.2	1.444 ± 0.175

Each value represents mean ± S.E. A significant difference between groups was analyzed by t-test in weeks 2 and 3, and one-way ANOVA in weeks 4 and 5 at p ≤ 0.05. “–” means that the test was not performed as the heat stress started from week 4.

Parameters in the same row followed by different superscript letters are significantly different (p ≤ 0.05).