Figure 3

Antibody and T-cell evaluation of the rSly adjuvant dose-dependent test. A P. multocida-specific antibodies in sera and the percentage of B CD4⁺ and C CD8⁺ T cells in PBMCs in the rSly adjuvant dose-dependent test. Piglets were intramuscularly immunized at week 0, and sera were collected at week 0 and 4 weeks. Total IgG S/P ratio = (Sample OD value − Negative OD value)/(Positive OD value − Negative OD value). Data are presented as the mean ± SD. Different superscript letters ^{(a, b, c)} indicate significant differences (p < 0.05) between treatment groups at the same time point based on Duncan’s test.