Fig. 6.
Oral administration of L. plantarum PS128 increased the number of 5-HT-positive cells in the ileum of naïve mice. a Representative images showing 5-HT-positive cells in the ileum tissues from mice. The 5-HT-positive cells were indicated by black arrows. Bars, 5 μm. b Numbers of 5-HT-positive cells per area in the ileum tissues of mice (n = 4 per group). Data were expressed as mean ± SEM and analyzed using unpaired t test. ***P < 0.001 compared with the vehicle control groups