Table 3.

Effects of β-carotene, curcumin, allicin, and sodium butyrate supplementation on serum immune parameters of breeder hens.

	IgA	IgG	IgM	LZM	β-DF
CON	4772.53 ± 94.45	45.70 ± 3.07	1735.34 ± 187.58	21.53 ± 1.67	20.03 ± 0.92
CCAB	8585.07 ± 123.28**	62.06 ± 4.76**	2756.53 ± 200.37**	28.02 ± 0.68*	22.51 ± 1.26*

CON, the control group; CCAB, the β-carotene, curcumin, allicin and sodium butyrate supplementation group; IgA, immunoglobulin A (ng/L); IgG, immunoglobulin G (μg/mL); IgM, immunoglobulin M (ng/mL); LZM, lysozyme (U/L); β-DF, β-defensin (ng/L). Significant differences in comparison with the CON group are expressed as *P < 0.05 and **P < 0.01 by Student's t-test. n = 10 breeder hens per group.