Figure 4.
Alterations in the oral and gut microbiota diversity in Pre-DM and T2DM patients were presented as follows: (A) Oral microbiota α-diversity, assessed via Observed species count and Shannon index; (B) Gut microbiota α-diversity, similarly evaluated with Observed species and Shannon index; (C) PCoA analysis of the oral microbiota; (D) PCoA analysis of gut microbiota across participants.