Figure 2

The body weights of chickens in each group. A Body weights (mean ± error) of the high-dose experiment. B Body weights (mean ± error) of the low dose experiment. The body weight of the chickens in different groups was measured at 1, 2, 3, 4, 5, and 6 weeks post-hatching to evaluate the effect of contaminated vaccine on growth rates. The body weights of different groups at the same time point were analysed by Duncan’s multiple-range test. ^a,b,c,dThe different letters represent significant differences (P < 0.05). The same letters indicate that the differences were not significant (P > 0.05). Data for the LaSota, LaSota/FAdV/CIAV/HD and LaSota/FAdV/CIAV/LD groups have been published in a previous study [5].