Figure 4.

Enterobactin-specific immune response and protective efficacy of the Ent–KLH conjugate vaccine to mitigate C. jejuni colonization in chickens (Trial B with two immunizations). (A) The Ent-specific IgG in the chickens immunized with Ent–KLH or PBS. Each bar represents the average of OD₄₅₀ absorbance from 30 individual serum samples (200-fold dilution) with standard deviation indicated by error bar. (B) Comparison of colonization of C. jejuni NCTC 11168 in the chickens immunized with Ent–KLH or PBS. Each bar represents mean CFU/g cecal contents ± the standard deviation in each group. The dotted line indicates detection limit. ** p < 0.01.