From cats to cortex: T. gondii and psychosis, depression, and anxiety
By
Gabriel Andrade
Abderrahim Benlahcene
Dalia Bedewy
May 13, 2026
Clinical Scorecard: The Impact of T. gondii from Felines on Psychotic, Depressive, and Anxiety Disorders
At a Glance
Category Detail
Condition Psychotic, depressive, and anxiety disorders Key Mechanisms T. gondii modulates dopaminergic signaling, neuroinflammation, and tryptophan–kynurenine metabolism. Target Population Individuals exposed to T. gondii, particularly cat owners. Care Setting Psychiatric and general healthcare settings.
Key Highlights
T. gondii establishes lifelong latent infection in the brain. Epidemiological data suggest associations between T. gondii seropositivity and schizophrenia. Cat ownership as a risk factor for mental health outcomes is inconsistent. Proposed mechanisms include neuroinflammation and immune dysregulation. Higher T. gondii antibody levels correlate with greater symptom severity. Guideline-Based Recommendations
Diagnosis
Consider T. gondii serology in patients with unexplained psychotic symptoms. Management
Monitor mental health symptoms in individuals with known T. gondii exposure. Monitoring & Follow-up
Regular assessment of psychiatric symptoms in seropositive individuals. Risks
Potential increased risk of schizophrenia and other psychotic disorders linked to T. gondii. Patient & Prescribing Data
Individuals with a history of cat ownership or T. gondii exposure.
Consider the role of T. gondii in the context of psychiatric treatment plans.
Clinical Best Practices
Integrate infectious disease screening in psychiatric evaluations. Educate patients about potential risks associated with cat ownership. Encourage further research on the neurobiological mechanisms of T. gondii. Related Resources & Content
