directfed glucose oxidase and its combination with b amyloliquefaciens sc06 on growth performance meat quality intestinal barrier antioxidative status and immunity of yellowfeathered broilers this experiment investigated the effects of dietary glucose oxidase god and its combination with b amyloliquefaciens sc06 basc06 on the growth performance meat quality intestinal physical barrier antioxidative status and immunity of male lingnan yellowfeathered broilers a total of 720 1dold broilers were assigned into 4 treatments with 6 replicates per treatment 30 birds per replicate 1 basal diet ctr 2 basal diet with 200 mgkg enramycin er 3 basal diet with 75 ukg god and 4 god diet 75ukg supplemented with 1 105 colonyforming units basc06kg feed gb for an experimental duration of 52 d the results showed that there were no significant effects of god or gb on growth performance of birds the shear force and drip loss of breast muscle of birds fed god and gb were less than those fed er while the shear force in gb significantly decreased compared to ctr also both god and gb treatment increased about 1fold expression of zo1 claudin1 occludin and muc2 genes in jejunal mucosa compared to ctr no difference was found between god and gb compared to ctr serum total antioxidant capability and glutathione peroxidase in god and gb increased while the malondialdehyde level and xanthine oxidase activity significantly decreased both god and gb treatments reduced the relative level of ho1 p53 and bax transcripts in liver it is worth noting that gb decreased transcription of p53 and bcl2 by 7611 and 5019 compared to god respectively in addition compared to ctr god and gb markedly increased serum il2 content by 110 and 182 while decreased ifn by 4357 and 5751 respectively the highest siga level in gb was found among four groups in conclusion dietary treatment with god and its combination with basc06 both had beneficial effects on shear force and drip loss expression of intestinal tight junctions antioxidative capacity and immune function it is suggested that gb had better effect than god on antiapoptosis