Figure 9.

Immune effect analysis of ducklings immunized with synthetic Pep1-KLH: (a) Antibodies bound to the peptide Pep0, DHAV-1, and DHAV-3 in the immunized duckling sera were tested by ELISA. Values represent three independent experiments with triplicates for each experiment; (b) survival records of the ducklings immunized with Pep1-KLH and PepN-KLH. All of the ducklings’ mental states were recorded daily for seven days; (c) the viral loads of DHAV-1 and DHAV-3 in the livers of the singly infected and co-infected ducklings (log10/g). There was no significant difference for the viral loads of DHAV-1 and DHAV-3 between the singly infected and the co-infected ducklings.