Enumeration of LAB species present two days (BSL-2d) and 30 days (BSL-30d) after the inoculation with a mix of three lactobacilli (BSL)as measured by real time PCR based on the transcripts of the 16S rRNA gene extracted from caecum of the gnotobiotic rats.

<p>Different letters indicate a statistical difference (p<0.05, Student-Newman-Keuls test). The number of 16S rRNA gene copies per gram of caecum in BSL-2d is in white. The number of 16S rRNA gene copies per gram of caecum in BSL-30d is in gray.