Fig. 1

Growth inhibitory effect of specific IgY. E. coli K88 was incubated with 0.5 mg/mL (a), 1 mg/mL (b), 5 mg/mL (c), 12.5 mg/mL (d), 25 mg/mL (e) and 50 mg/mL (f) of yolk powder or specific IgY in LB liquid medium containing 50 μg/mL streptomycin. LB medium without yolk powder or IgY was used as blank control. Samples were taken at 0, 2, 4, 6, 8, 10, 12, 14 and 24 h of incubation and optical density at 600 nm was measured. Results were expressed as means ± SEM, n = 3, (Specific IgY versus Yolk powder; ***, P < 0.001) (Yolk powder versus Control group; ###, P < 0.001). Unless otherwise noted, significance was determined by one-way ANOVA with Tukey’s post hoc test. Results were repeated in three independent experiments. The raw data was shown in Additional file 1: Figure S1