Figure 5.

Variations in gut microbiota composition along the canine digestive tract and impact of dog sizes. Main bacteria populations found in the different compartments of the dog gastrointestinal tract are represented in (a). Bacteria counts are expressed in colony forming units (CFU) per gram of digestive content. Results from studies exploring by 16S rRNA Illumina sequencing canine microbiota composition (regardless of dog size) in the different digestive compartments are presented in (b). Influence of dog sizes on faecal microbiota composition at the phylum level is shown in (c) and corresponding Shannon index in (d). Canine main phyla are Firmicutes (Firm), Bacteroidetes (Bact), Fusobacteria (Fuso), Proteobacteria (Proteo) and Actinobacteria (Actino). The same caption as used in Fig. 1 was applied