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Box plot of the median relative abundances of the most dominant phyla in the three sample groups (Firmicutes, Bacteroidetes, Proteobacteria, Actinobacteria, and Fusobacteria). The phylum Proteobacteria (with the genus Helicobacter) increased in its relative abundance from the H.p.- over the H.p.+/CagA− to the H.p.+/CagA+ group. Significant differences were only found between the H.p.− vs the H.p.+/CagA− and the H.p.− vs H.p.+/CagA+ groups, respectively.
