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Updated: May 5, 2026

Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis
Published on: November 21, 2013
[Schizophenia and premorbid infections]
Abstract:
Schizophrenia is a disease of unknown etiology. Many authors have studied its association with infections. By meta-analysis viruses are the most studied agents, relationship with the Borna virus and human endogenous retrovirus W. Also, C. pneumoniae and C. psittaci DNA in blood are more common in patients. Finally, there is association with parasitism by T. gondii, despite the existence of publication bias. Serologically, in our environment, anti-Toxoplasma IgG may be a risk factor related to schizophrenia, and may have potential value for better diagnosis and prevention.
Insights
Infections may play a role in schizophrenia development. Research indicates links between schizophrenia and infections like Borna virus, Chlamydia pneumoniae, and Toxoplasma gondii.
Area of Science:
- Neuroscience
- Infectious Diseases
- Psychiatry
Background:
- Schizophrenia's etiology remains largely unknown, prompting research into potential infectious links.
- Meta-analyses highlight viruses (Borna virus, human endogenous retrovirus W) as frequently studied infectious agents.
- Bacterial DNA (Chlamydia pneumoniae, Chlamydia psittaci) and parasitic infections (Toxoplasma gondii) are also investigated.
Discussion:
- While publication bias exists for Toxoplasma gondii, serological evidence suggests anti-Toxoplasma IgG may be a risk factor.
- This association warrants further investigation into the role of specific pathogens in schizophrenia.
- Understanding these links could improve diagnostic and preventative strategies.
Key Insights:
- Viruses, bacteria, and parasites are implicated in schizophrenia research.
- Toxoplasma gondii infection, indicated by anti-Toxoplasma IgG, shows a potential association with schizophrenia risk.
- Infectious agents represent a promising avenue for understanding schizophrenia etiology.
Outlook:
- Further research is needed to confirm the causal role of specific infections in schizophrenia.
- Investigating anti-Toxoplasma IgG could aid in schizophrenia diagnosis and prevention.
- Exploring the interplay between infectious agents and host genetics may reveal new therapeutic targets.
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