Fig. 3

a The relative abundance of three groups at the phylum level (top 20); b The relative abundance of three groups at the genus level (top 20); c The relative abundance of three groups at the species level (top 20); d α-diversity index analysis of the three study groups (including Chao1 index and ACE index); e Venn diagram analysis of three groups; f PCoA of the three study groups; g Species composition with significant differences at the species level between the NDM and DM-DE groups (top 20)