FIG 5.

Relationship of human stomach and esophagus microbiota. Analyses of correlations of taxonomic distances (weighted UniFrac) between gastric aspirate and esophageal biopsy samples with the relative abundances of the phylum Firmicutes (A) or the genus Streptococcus (B) in aspirate samples were performed on the basis of Spearman’s (two-tailed) rank correlation coefficient analysis. Each bar shows the relative abundance of Firmicutes (A) or Streptococcus (B) of an individual aspirate sample, as well as the range of taxonomic distances found between the microbiota of this sample and all esophagus biopsy samples, including samples from H. pylori-positive and -negative patients.