Fig. 3
From: Immune efficacy of five novel recombinant Bordetella bronchiseptica proteins
Antibody response elicited after immunization with recombinant proteins or mock-vaccinated (PBS control) before challenge. a Histogram indicating the recombinant protein specific serum antibody titers (total IgG) of sera collected from all mice 28 days after first immunization. b Histogram indicating the recombinant protein specific serum antibody titers (subtypes IgG1and IgG2a) of sera collected from the mice immunized with rPL, rPPP, and PBS controls at 28 days after first immunization. Data are presented as the mean optical density obtained from ELISA analysis of individual serum samples (n = 8 per treatment) at a 1:200 dilution. The curve of antibody response was drawn where the ordinate axis represents the absorbance at 450 nm ± standard deviation. * indicates highly significant differences compared with the mice immunized with PBS (P < 0.001)