Soya saponin improves egg-laying performance and immune function of laying hens

Table 8 Serum immunoglobulin levels in 5th and 10th week

	Item	Control	50 ppm SS	500 ppm SS	P-value
5th week(27 weeks old, n = 6)	IgG, ng/mL	1156.99 ± 52.49	1149.89 ± 35.00	1142.72 ± 46.55	0.863
	IgA, ng/mL	296.73 ± 14.41	306.59 ± 4.67	309.71 ± 5.80	0.072
	IgM, ng/mL	86.33 ± 14.59	100.28 ± 22.81	98.09 ± 15.22	0.374
10th week(32 weeks old, n = 8)	IgG, ng/mL	1109.62 ± 91.10^a	1262.94 ± 92.65^b	1224.45 ± 126.08^b	0.021
	IgA, ng/mL	294.04 ± 12.71	303.03 ± 46.22	307.40 ± 32.11	0.719
	IgM, ng/mL	70.11 ± 10.80^a	94.08 ± 11.95^b	85.87 ± 16.77^b	0.006

At the end of the 5th and 10th week of the trial, 6–8 birds from each treatment were selected to obtain wing vein blood and harvest serum. The levels of IgG, IgA, and IgM in the serum were measured. The data in Table 8 different superscript letters indicate significant difference (P < 0.05); same superscript letters indicate no difference (P > 0.1), the same below

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