TABLE 5.
Different microbiota findings in tic disorder (TD) patients.a
| No. | Study | Gut microbiota profiles | Other findings |
| 1 | Lee and Wong (2018) | Family: | Prevotella was negatively correlated with the severity of tics. |
| ↓:Prevotellaceae | |||
| Genus: | |||
| ↑:Ruminococcus | |||
| ↓:Prevotellab | |||
| Species: | |||
| ↓:Clostridium bartlettii, Prevotella copri, and Subdoligranulum variabile | |||
| 2 | Zhao et al. (2020) | Genus: | |
| ↓:Bifidobacterium, Catenibacterium, Collinsella, and Dorea | |||
| Species: | |||
| ↑:Bacteroides vulgatus | |||
| ↓:Allisonella histaminiformans, Bacteroides coprocola, Catenibacterium mitsuokai, Dialister succinatiphilus, Holdemanella biformis, and Roseburia faecis | |||
| 3 | Xi et al. (2021) | Species: ↑:Bacteroides plebeius, Ruminococcus lactaris ↓:Prevotella stercorea, Streptococcus lutetiensis | Bacteroides eggerthii, Bacteroides dorei, and Bacteroides thetaiotaomicron positive correlations with the YGTSS scores. |
aTD, tic disorder; YGTSS, Yale Global Tic Severity Scale. bSevere TS samples (n = 14).