Fig. 3From: A novel Salmonella strain inactivated by a regulated autolysis system and expressing the B subunit of Shiga toxin 2e efficiently elicits immune responses and confers protection against virulent Stx2e-producing Escherichia coli The levels of two IgG isotypes, IgG1 and IgG2a, elicited by JOL1454 immunization. The values indicate the means of optical density at 450 nm from sera collected from immunized mice (n = 9), and error bars indicate standard deviation (s.d). The numbers above the bars indicate the IgG1/IgG2a ratios. PI: post-immunizationBack to article page