Fig. 4.

Correlation of change in gut IgA to change in α4β7⁺DR⁺CD4⁺ cells in the positive and negative responders. (A) The positive responders showed a strong correlation (ρ = 0.82; P = 0.02) of gut IgA to gut marker expression. (B) This was not observed in the negative responders (ρ = 0.31, P = 0.2) or those given (C) Vivotif alone (ρ = 0.37; P = 0.2). Correlations were analyzed using the Spearman rank correlation test.