. 2019 Jul 27;9(8):493. doi: 10.3390/ani9080493

Table 4.

Effect of COS supplementation on relative immune organ weight in broilers (g/kg).

Organ ¹	Control Group	Antibiotic Group	COS Group	SEM	p-Value
Thymus	3.46	4.40	4.37	0.20	0.095
Spleen	0.86	0.93	0.91	0.04	0.762
Bursa of Fabricius	1.81	2.32	1.94	0.14	0.333

¹ Control group, basal diet; Antibiotic group, basal diet supplemented with 50 mg/kg chlortetracycline; COS group, basal diet supplemented with 30 mg/kg chitooligosaccharide; SEM, standard error of means (n = 6).