Figure 1. Antigen-specific IgG plasma levels detected by indirect ELISA. Plasma IgG levels (ng/ml) against the OMP antigens of (A) Salmonella Typhimurium (ST), (B) Salmonella Enteritidis (SE), and (C) Salmonella Gallinarum (SG) were monitored for 7 weeks post-prime immunization (PPI) with a live attenuated Salmonella Typhimurium (ST) strain. The values are expressed as mean±SEM. Antibody levels were considered significant if the p-value was less than 0.05. *p<0.05, **p<0.01 The arrow (↑) indicates the time point at which the booster was administered (4 weeks PPI). (♦) group A, the non-immunized control group and (■) group B, the ST-immunized group. Figure 1. Antigen-specific IgG plasma levels detected by indirect ELISA. Plasma IgG levels (ng/ml) against the OMP antigens of (A) Salmonella Typhimurium (ST), (B) Salmonella Enteritidis (SE), and (C) Salmonella Gallinarum (SG) were monitored for 7 weeks post-prime immunization (PPI) with a live attenuated Salmonella Typhimurium (ST) strain. The values are expressed as mean±SEM. Antibody levels were considered significant if the p-value was less than 0.05. *p<0.05, **p<0.01 The arrow (↑) . . . Immune Netw. 2015 Feb;15(1):27-36. http://dx.doi.org/10.4110/in.2015.15.1.27