Fig. 2: Fermented formula drives sIgA production similarly to breastfeeding.

a, b sIgA levels according to mode of delivery (vaginal in a and caesarean section in b) and type of feeding were determined in faecal samples. n = 13 (VBM and VF) and n = 12 (VS, CBM, CS and CF) biologically independent samples. Significance determined by one-way ANOVA using TukeyHSD post hoc test. Box plots show the interquartile range (IQR), the horizontal lines show the median values and the whiskers indicate the minimum-to-maximum range. CBM caesarean delivery breast milk feeding, CF caesarean delivery fermented formula feeding, CS caesarean delivery standard formula feeding, VBM vaginal-delivery breast milk feeding, VF vaginal-delivery fermented formula feeding, VS vaginal-delivery standard formula feeding. Source data are provided as a Source Data file.