Fig. 2.

Pairwise comparison based on unweighted Unifrac distances between cecal microbial communities in broilers supplemented with probiotic (P-group) and broilers fed without probiotics (C-group), on days 1, 10 and 42 of growth. The Principal Component Analysis plot (PCoA) based on Bray–Curtis dissimilarities confirmed bacterial community differences centered on bird’s age. The unweighted UniFrac distance PCoA plots based on treatment did not unveil any significantly distinct clustering pattern between the C- and P-groups