Descriptions of bacterial strains, magnitude of the plasmablast responses to various antigens and results of statistical comparisons in the Vi group.

The bacterial strains used in the ELISPOT assay, the antigens shared with S. Typhi by each strain, the number of plasmablasts (ASC/106 PBMC) reactive with the strains (means and 95% confidence intervals), and statistical comparison (Bonferroni-corrected Wilcoxon signed rank test) between the responses in 25 volunteers vaccinated with the Vi capsular polysaccharide vaccine one week earlier. Significant differences are indicated with asterisks (***p