Fig. 2

Rarefication analysis (number of observed species) of the 16S rRNA gene sequences obtained from foal fecal samples, T1: 1–14 days of age, T2: 15–28 days of age. Each line represents the average of a group: healthy foals (n = 11) and foals with diarrhea (n = 4 at T1 and n = 3 each at T2). The analysis was performed on a selected subset of 17,800 sequences (lowest sequence number of all samples)