Fig. 1From: Effects of dietary supplementation of probiotic Enterococcus faecium on growth performance and gut microbiota in weaned pigletsComparison of the OTUs of the four groups on different experimental days. The number of observed OTUs in fecal samples collected at experimental day 1 (A), day 7 (B), and day 14 (C) sharing the sequence similarity of ≥ 97% is shown. a,bSmall letter superscript represents significant difference (P < 0.05). Data were statistically analyzed by repeated-measures one-way ANOVA, followed by Duncan’s multiple-range testBack to article page