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(A to C) ALS IgA geometric mean titers (95% confidence intervals) of antibody responses to LPS (A), LTB (B), and CFA/I (C) on the day before challenge (day 0) and on days 7, 10, 28, and 84 following challenge or rechallenge with ETEC strain H10407. (D) IgA responses to CFA/I expressed in ALS geometric mean titers (95% confidence intervals) in naive subjects who showed bimodal responses after challenge with ETEC strain H10407. The titers are in log2 scale and presented as antilogs.
