Figure 2

Effects of different treatments on anti-BSA antibodies of chickens. High-oxygen: chickens were reared in a room with oxygen concentrations between 25.8% and 26.5%; Low-oxygen: chickens were reared in a room with oxygen concentrations between 20.7% and 21.4%. CON: chickens were fed basal diet; AUR: chickens were fed basal diet supplemented with aureomycin (50 mg/kg diet); PRO: chickens were fed basal diet and inoculated with L. plantarum (109 CFU/chicken) by gavage on day 1. *Indicates significant differences between the high-oxygen room and the low-oxygen room (P < 0.05, n = 24). a,bDifferent letters indicate significant dietary differences within the same room (P < 0.05, n = 6).