Table 3.

Effects of feeding blends of essential oils and organic acids (EOA) on the immune organ index (g/kg) of broilers¹.

Item	Experimental diets2				SEM	P-value
	CON	EG	EF	AG
Day 21
Thymus	4.20	4.26	4.24	4.27	0.158	0.672
Spleen	0.80	0.81	0.94	0.84	0.039	0.508
Bursa of Fabricius	2.18	1.79	2.25	1.96	0.105	0.147
Day 42
Thymus	3.65	2.85	2.70	2.91	0.148	0.747
Spleen	0.64b	0.96a	0.92a	0.78ab	0.049	0.049
Bursa of Fabricius	0.43	0.46	0.63	0.48	0.058	0.736

SEM = standard error of the mean.

^a,b Within a row, numbers with different superscripts differ statistically at P ≤ 0.05.

¹Ten replicates per treatment group (n = 10).

²Dietary treatments were as follows: CON = basal diet; EG = basal diet + 0.30 g/kg product EOA during the grower period; EF = basal diet + 0.30 g/kg product EOA during the finisher period; AG = basal diet + 0.15 g/kg enramycin during the grower period.