Dietary Mannanoligosaccharide Supplementation Improves Growth Performance, Intestinal Integrity, Serum Immunity, and Antioxidant Capacity of Partridge Shank Chickens.

Herein, we assessed the impact of dietary addition of mannanoligosaccharide (MOS) on the growth, intestinal morphology, serum immune status, and oxidative status in Partridge Shank chickens. For the experiment, one-day-old chicks (=192) were randomized into six replicates (=8/replicate) and fed four different diets: a basal diet containing 0 (Control group), 0.5, 1, or 1.5 g MOS per kg of diet (g/kg) for 50 d. Relative to the control, the group fed 0.5 g/kg MOS decreased feed consumption from 22 to 50 d and 1 to 50 d (<0.05). By adding MOS, the height of the intestinal villus and the villus height to crypt depth ratio were increased (<0.05); 1.5 g/kg MOS was the best dosage for these parameters. Jejunal and ileal goblet cell density increased following MOS supplementation at 21 d (<0.01) and 50 d in the jejunum (<0.05), respectively. Moreover, adding MOS to the diet increased the contents of IgA and IgM at 21 d (<0.05) and total antioxidant capacity (<0.05) at 50 d in the serum but decreased malondialdehyde content (<0.01) at 21 d in the group fed 0.5 and 1.5 g/kg MOS. The findings suggested that MOS supplementation could affect feed consumption, intestinal health, serous immunity, and antioxidant capacity of Partridge Shank chickens.