Fig. 2From: Immunogenicity and protective efficacy of Salmonella enterica serovar Pullorum pathogenicity island 2 mutant as a live attenuated vaccine candidateDetermination of serum IgG levels. Vaccinated group and control group refer to Fig. 1. Values represent the mean ± SEM. *Significant difference compared to the control group, P < 0.05Back to article page