Fig. 4.

Presence of L. plantarum 423 and E. mundtii ST4SA in the faeces of mice after a single oral administration. Groups of three mice each (n = 3, per strain) were administered once with 4 × 10⁹ CFU L. plantarum 423 Fluc or E. mundtii ST4SA Fluc. At each time point, log₁₀ averages of the (a) cell counts per 100 mg faeces and the corresponding (b) bioluminescence in log₁₀ p/s per 100 mg faeces for each group of three mice are plotted with standard deviations. Significant differences between the two groups were assessed using the Mann-Whitney nonparametric test and are indicated with one (P < 0.05) or three (P < 0.001) asterisks. The background bioluminescence signal (approximately 5 × 10³ p/s) emitted is represented by a dashed line