Tylosin associated samples (green, day 14) were separated from the non tylosin associated samples mostly along PCA axis 2

(accounting for 13.5% of all variability between samples), indicating that tylosin treatment had an effect on the microbial composition of the jejunal microbiota. Spirochaetes Spirochaetes were found in all 5 dogs at baseline (mean: 14.15%, range: 0.05% to 62.97% of all identified sequences). On day 14, sequences of Spirochaetes were found in 2 of 5 dogs, with a reduction of the mean to 0.02% (range 0.00% to 0.06%; p = 0.039). This bacterial phylum was found on day 28 only in 3 of 5 dogs (mean 0.36%, range 0.00% to 1.48%). In the dog with the highest proportion of sequences belonging to Spirochaetes at baseline (62.97%), no Selleckchem SCH727965 such sequences were identified on days 14 or 28. Fusobacteria Fusobacteria were detected in 3 of 5 dogs at baseline, but this bacterial phylum was a major constituent of the jejunal microbiota in only 1 dog (18.22% of all sequences). In this dog, Fusobacteria decreased to 0.16% on day 14, and rebounded to 27.98% on day 28. In the remaining dogs, Fusobacteria were detected at low proportions (range 0.00% to 2.25%) at the three sampling points, and overall no significant changes were observed

for this phylum. Bacteroidetes Sequences belonging to the phylum Bacteroidetes were detected in all dogs at all 3 time points (mean 5.34% of all sequences). This group showed marked inter-individual differences in the response to tylosin on the phylum level. On learn more day 14 the proportions of Bacteroidetes were increased in 3 dogs, decreased in 1 dog, and unchanged in 1 dog. On day 28, there was a trend for the proportions mafosfamide of Bacteroidetes to VX-809 research buy return to baseline values. Analysis on various phylogenetic levels revealed that the proportions of Flavobacteriacae increased by day 14 (marked increase in 3 of 5 dogs) and returned to baseline by day 28 (p = 0.09). In contrast, the order Bacteroidales decreased in proportions in all 5 dogs

by day 14 (mean 5.95% on day 0 vs. 0.12% on day 14), and tended to return to baseline by day 28 (mean 1.63% on day 28; p = 0.09). This was predominantly due to a significant decrease in Prevotellaceae (mean 2.09% on day 0 vs. 0.03% on day 14; p = 0.039). Furthermore, Prevotellaceae did not recover by day 28 and were not detected in any of the dogs at this time point. Bacteroidaceae decreased by day 14 (mean 1.71% on day 0 vs. 0.06% on day 14), but this effect was not significant (p = 0.49). Furthermore, Bacteroidaceae increased by day 28 (mean 0.42% of all sequences). Firmicutes The phylum Firmicutes was the second most abundant bacterial group in the canine jejunum (Figure 2). On a phylum level, no significant changes were observed across the three time points for Firmicutes. Clostridiaceae increased from 5.47% to 19.46% and decreased to 10.72% by day 28.