1. 
   Microbe Pseudomonadota

   Psychromonadaceae NamePsychromonadaceae
2. 
   Microbe Pseudomonadota

   Psychromonas arctica NameName close to Psychromonadaceae
3. 
   Microbe Pseudomonadota

   Psychromonas NameName close to Psychromonadaceae
4. 
   Microbe Pseudomonadota

   Psychromonas sp. SA13A Unnamed strain NameName close to Psychromonadaceae
5. 
   Microbe Pseudomonadota

   Aeromonadaceae NameName close to Psychromonadaceae
6. 
   Microbe Bacteroidota

   Porphyromonadaceae bacterium FC4 Unnamed strain NameName close to Psychromonadaceae
   under 1% of healthy people
7. 
   Microbe Pseudomonadota

   Psychrobacter MeaningAbout Psychromonadaceae
   under 1% of healthy people
8. Research Psychoneuroendocrinology · 2024 Observational

   Comparative analysis of gut microbiota in major depressive disorder and schizophrenia during hospitalisation - the case-control, post hoc study.

   [Ruminococcus] torques

   MeaningAbout Psychromonadaceae
   PubMed ↗
9. 
   Microbe Pseudomonadota

   Psychrobacter fulvigenes MeaningAbout Psychromonadaceae
   under 1% of healthy people
10. 
    Microbe Thermodesulfobacteriota

    Desulfuromonadaceae NameName close to Psychromonadaceae
11. 
    Microbe Basidiomycota

    Phenoliferia psychrophila MeaningAbout Psychromonadaceae
12. Research Frontiers in microbiology · 2022

    Gut Microbiota and Psychiatric Disorders: A Two-Sample Mendelian Randomization Study.

    [Clostridium] innocuum

    MeaningAbout Psychromonadaceae
    PubMed ↗
13. 
    Microbe Pseudomonadota

    Psychrobacter faecalis MeaningAbout Psychromonadaceae
    under 1% of healthy people
14. 
    Microbe Pseudomonadota

    Halomonadaceae MeaningAbout Psychromonadaceae
15. Research Journal of psychiatric research · 2019

    Similarly in depression, nuances of gut microbiota: Evidences from a shotgun metagenomics sequencing study on major depressive disorder versus bipolar disorder with current major depressive episode patients.

    Bifidobacterium longum

    MeaningAbout Psychromonadaceae
    PubMed ↗
16. 
    Microbe Pseudomonadota

    Psychrobacter cryohalolentis MeaningAbout Psychromonadaceae
17. Research Scientific reports · 2026

    Screening psychobiotic bacteria in the human colonic microbiota under high perceived stress.

    Akkermansia muciniphilaEnterococcus faecium

    MeaningAbout Psychromonadaceae
    PubMed ↗
18. Research International journal of systematic and evolutionary microbiology · 2021

    Vescimonas gen. nov., Vescimonas coprocola sp. nov., Vescimonas fastidiosa sp. nov., Pusillimonas gen. nov. and Pusillimonas faecalis sp. nov. isolated from human faeces.

    Vescimonas coprocolaOscillibacter valericigenes

    MeaningAbout Psychromonadaceae
    PubMed ↗
19. Research Nutrients · 2025 Systematic review

    Psychobiotics in Depression: Sources, Metabolites, and Treatment-A Systematic Review.

    Akkermansia muciniphilaBifidobacterium breve

    MeaningAbout Psychromonadaceae
    PubMed ↗
20. 
    Microbe Bacillota

    Psychrobacillus MeaningAbout Psychromonadaceae
    under 1% of healthy people
21. Research Cells · 2023

    Exploration of the Gut Microbiome in Thai Patients with Major Depressive Disorder Shows a Specific Bacterial Profile with Depletion of the Ruminococcus Genus as a Putative Biomarker.

    Coprococcus comesEnterocloster bolteaeHungatella hathewayi

    MeaningAbout Psychromonadaceae
    PubMed ↗
22. 
    Microbe Pseudomonadota

    Alteromonadaceae NameName close to Psychromonadaceae
23. 
    Microbe Pseudomonadota

    Psychrobacter maritimus MeaningAbout Psychromonadaceae
    under 1% of healthy people
24. Research Nature communications · 2022

    Gut microbiome-wide association study of depressive symptoms.

    Eubacterium ventriosum

    MeaningAbout Psychromonadaceae
    PubMed ↗
25. 
    Microbe Pseudomonadota

    Psychrobacter immobilis MeaningAbout Psychromonadaceae
    under 1% of healthy people
26. Research Journal of affective disorders · 2026 Observational

    Integrative multi-kingdom gut microbiome analysis uncovers clinical signatures of major depressive disorder.

    Bifidobacterium pseudocatenulatum

    MeaningAbout Psychromonadaceae
    PubMed ↗
27. 
    Microbe Pseudomonadota

    Psychroglaciecola MeaningAbout Psychromonadaceae
28. Research BMC microbiology · 2021 Observational

    Involvement of mucosal flora and enterochromaffin cells of the caecum and descending colon in diarrhoea-predominant irritable bowel syndrome.

    [Ruminococcus] torques

    MeaningAbout Psychromonadaceae
    PubMed ↗
29. 
    Microbe Fusobacteriota

    Psychrilyobacter MeaningAbout Psychromonadaceae
30. Research Psychoneuroendocrinology · 2019 Animal study

    Faecalibacterium prausnitzii (ATCC 27766) has preventive and therapeutic effects on chronic unpredictable mild stress-induced depression-like and anxiety-like behavior in rats.

    Faecalibacterium prausnitzii

    MeaningAbout Psychromonadaceae
    PubMed ↗
31. 
    Microbe Bacillota

    Psychrobacillus faecigallinarum MeaningAbout Psychromonadaceae
    under 1% of healthy people
32. Research Applied microbiology and biotechnology · 2021 Animal study

    A next-generation probiotic: Akkermansia muciniphila ameliorates chronic stress-induced depressive-like behavior in mice by regulating gut microbiota and metabolites.

    Akkermansia muciniphila

    MeaningAbout Psychromonadaceae
    PubMed ↗
33. Research Journal of affective disorders · 2024

    Coprococcus eutactus screened from healthy adolescent attenuates chronic restraint stress-induced depression-like changes in adolescent mice: Potential roles in the microbiome and neurotransmitter modulation.

    Coprococcus eutactus

    MeaningAbout Psychromonadaceae
    PubMed ↗
34. Research Progress in neuro-psychopharmacology & biological psychiatry · 2025 Review

    Oropharyngeal microbiota in patients with psychotic disorders: A scoping review on compositional and functional alterations.

    Lactobacillus gasseri

    MeaningAbout Psychromonadaceae
    PubMed ↗
35. Research Brain, behavior, and immunity · 2024

    Reproducible gut microbial signatures in bipolar and schizophrenia spectrum disorders: A metagenome-wide study.

    Klebsiella pneumoniae

    MeaningAbout Psychromonadaceae
    PubMed ↗
36. 
    Microbe Bacillota

    Marinilactibacillus psychrotolerans MeaningAbout Psychromonadaceae
37. Research BMC neurology · 2026 Observational

    Gut microbiota profiles associated with temporal lobe epilepsy and psychiatric comorbidities: a family-matched case-control 16S rRNA study.

    Coprococcus comesBacteroides stercorisPhocaeicola plebeius

    MeaningAbout Psychromonadaceae
    PubMed ↗
38. 
    Microbe Pseudomonadota

    Psychrobacter sanguinis MeaningAbout Psychromonadaceae
    under 1% of healthy people
39. 
    Microbe Pseudomonadota

    Psychrobacter arenosus MeaningAbout Psychromonadaceae
    under 1% of healthy people
40. 
    Microbe Pseudomonadota

    Pseudomonas psychrophila MeaningAbout Psychromonadaceae
    under 1% of healthy people

Research: PubMed, U.S. National Library of Medicine · citations link to PubMed