Abundance of lactobacilli in mucosa-adherent ileal and fecal samples in different housing environments. The Lactobacillaceae family included L. reuteri, L. amylovorous LAB31, L. johnsonii, L. delbrueckii subsp. bulgaricus, L salivarius and L. mucosae. L. reuteri, L. delbrueckii and L. johnsonii were all significantly lower in the IN and IR groups compared to the OUT group. Values are expressed as means ± SEM (N = 4).