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Serum antibody levels of ND at various stages.
| Stage | Control group | ABG | ABP1 | ABP2 |
|---|---|---|---|---|
| 21 d | 4.22 ± 0.25a | 5.00 ± 0.36b | 4.56 ± 0.19 | 4.33 ± 0.21 |
| 40 d | 4.78 ± 0.18a | 4.56 ± 0.39a | 4.79 ± 0.25a | 5.78 ± 0.25b |
a,bIn the same line, the same letter superscripts mean no significant difference (P > 0.05), and the different letter superscripts mean significant difference (P < 0.05).
Abbreviations: ABG, antibiotic group; ABP1, antimicrobial peptide group 1; ABP2, antimicrobial peptide group 2.
