A set of 158 synthetic peptides of 15-mer overlapping with 11 amino acid residues of FliD on peptide microarrays was mapped with field chicken sera.
Peptides 24, 91 and 92 had relatively high reactivity to 64 individual sera, indicating these peptides represented the shared epitopes on FliD.
Peptides 24, 91 and 92 were also recognized by sera from chickens immunized with the purified recombinant FliD protein.