Analysis of T cell subsets in the peripheral blood of piglets after FMT treatment. A Capsulized FMT had no significant effect on the CD3+ level in the peripheral blood; B oral faecal microbial capsule significantly increased the CD4+ level; C there was no difference in the CD8+ level in the peripheral blood between recipient and control piglets; D the oral faecal microbial capsule significantly increased the CD4+/CD8+ ratio; E Dot plots of isolated immune cells in the peripheral blood, gated for live cell analysis. Representative flow cytometry data for T cells (CD3+ cells, CD3+ CD4+ cells, CD3+ CD8+ cells) in the peripheral blood. The data are expressed as the mean ± SEM. a, b represents significant differences between two groups (n = 12 per group for A–E).