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Regulation of gut flora abundance in immunosuppressed ducks by Echinacea purpurea. (A) Cumulative histogram of the top 10 species in relative abundance at the phylum taxonomic level; (B) Cumulative histogram of the top 10 species in relative abundance at the genus taxonomic level; (C) Box plot of the alpha diversity index; (D) PCA analysis of beta diversity. (N = 5).
