Table 6.

The effects of feeding yeast bioactives (YB) to broiler breeders and/or their offspring on the weight of immune organs and the concentration of immunoglobulin A (IgA) in jejunum mucosa of broiler chickens challenged with Eimeria.¹

Items		Bursa, mg/g BW	Spleen, mg/g BW	IgA, μg/mg protein
Sex × Eimeria challenge
Sex	Eimeria challenge
Male	No	1.978	0.937b	0.432
Male	Yes	1.816	0.983b	0.696
Female	No	1.786	0.913b	0.443
Female	Yes	1.868	1.187a	0.738
SEM		0.081	0.044	0.088
Main effect, sex
Sex
Male		1.897	0.960b	0.585
Female		1.827	1.050a	0.570
SEM		0.057	0.031	0.062
Main effect, Eimeria challenge
No		1.882	0.925b	0.438b
Yes		1.842	1.085a	0.717a
SEM		0.057	0.031	0.062
Main effect, feed
Broiler breeder	Broiler chicks
Control	Control	1.865	1.051	0.554
YB	Control	1.845	0.954	0.567
Control	YB	1.947	1.013	0.595
YB	YB	1.792	1.000	0.593
SEM		0.081	0.044	0.088
Probabilities (P-value)
Sex		0.384	0.045	0.865
Eimeria challenge		0.618	<0.001	0.003
Feed		0.588	0.491	0.985
Sex × Eimeria challenge		0.133	0.011	0.992
Sex × feed		0.067	0.418	0.769
Eimeria challenge × feed		0.138	0.358	0.934
Sex × Eimeria challenge × feed		0.662	0.600	0.996

^a,bMeans assigned different letter superscripts within a response criterion differ, P < 0.05.

¹BW, body weight.