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. 2019 Jul 17;10:473. doi: 10.3389/fpsyt.2019.00473

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Copyright © 2019 Xu, Xu, Li 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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Forest plot of percentages of Faecalibacterium, Parabacteroides, Ruminococcus, and Bacteroides in autism spectrum disorder (ASD). (A–C) Percentages of Faecalibacterium, Parabacteroides, and Ruminococcus in the total detected microflora, respectively. Fixed-effects models were used to assess Faecalibacterium, Parabacteroides, and Ruminococcus. The pooled percentages of Faecalibacterium, Parabacteroides, and Ruminococcus from the included studies were 8.8%, 0.4%, and 3.3%, respectively. (D) Relative abundance of Bacteroides. A random-effects model was used to analyze Bacteroides, contributing to higher between-study heterogeneity (I ² > 50%).