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. 2022 Aug 24;12:942460. doi: 10.3389/fcimb.2022.942460

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Copyright © 2022 Chen, Xu, Wu, Cao, Li, Hou, Wang, Liu, Ji, Zhang and Li

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The similarity and overlap with oral and fecal microbiotas. The Venn diagrams illustrate all overlapping genera identified in the oral and gut microbiota in the normal control (A), the mild AD (B), and the moderate AD (C) groups. Subgingival and gut microbiomes are colored in blue and yellow nodes, respectively. Pcn, subgingival plaque of normal cognition controls; Fcn, feces of normal cognition controls; Pmild, subgingival plaque of mild AD; Fmild, feces of mild AD; Pmoderate, subgingival plaque of moderate AD; Fmoderate, feces of moderate AD.