Evidence map›Paper›PMID 30969961›Full record

SynthesisPLoS neglected tropical diseases2019

Relationship between toxoplasmosis and obsessive compulsive disorder: A systematic review and meta-analysis.

Tooran Nayeri Chegeni, Shahabeddin Sarvi, Afsaneh Amouei, Mahmood Moosazadeh, Zahra Hosseininejad, Sargis A Aghayan, Ahmad Daryani

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in PLoS neglected tropical diseases, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 6 pooled it
4.9field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 6 syntheses or guidelines pooled it, 54 citations in OpenAlex.

  1. Pooled it
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  5. Pathogens and global health · 2020
    Pooled it
  6. Pooled it
  7. A review onParasite epidemiology and control · 2026
    Review
  8. iScience · 2026
    Article
  9. Beyond Latency: ChronicBiomedicines · 2025
    Review
  10. Article
  11. Diseases Caused by and Behaviors Associated withPathogens (Basel, Switzerland) · 2024
    Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. The Association ofInternational journal of environmental research and public health · 2022
    Article
  18. Review
  19. Review
  20. Comprehensive Overview ofPathogens (Basel, Switzerland) · 2021
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Tooran Nayeri ChegeniToxoplasmosis Research Center, Mazandaran University of Medical Sciences, Sari, Iran.
Shahabeddin SarviToxoplasmosis Research Center, Mazandaran University of Medical Sciences, Sari, Iran.
Afsaneh AmoueiToxoplasmosis Research Center, Mazandaran University of Medical Sciences, Sari, Iran.
Mahmood MoosazadehHealth Sciences Research Center, Addiction Institute, Mazandaran University of Medical Sciences, Sari, Iran.
Zahra HosseininejadToxoplasmosis Research Center, Mazandaran University of Medical Sciences, Sari, Iran.
Sargis A AghayanLaboratory of Zoology, Research Institute of Biology, Yerevan State University, Yerevan, Armenia.ORCID 0000-0001-8516-2778
Ahmad DaryaniToxoplasmosis Research Center, Mazandaran University of Medical Sciences, Sari, Iran.ORCID 0000-0001-8571-5803
Mazandaran University of Medical Sciences · IRYerevan State University · AM

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA few studies investigated the relationship between toxoplasmosis and mental disorders, such as obsessive compulsive disorder (OCD). However, the specific nature of the association between Toxoplasma gondii (T. gondii) infection and OCD is not yet clear. The aim of this study was to collect information on the relationship between OCD and toxoplasmosis and assess whether patients with toxoplasmosis are prone to OCD.

methodsFor the purpose of this study, 6 major electronic databases and the Internet search engine Google Scholar were searched for the published articles up to July 30th, 2018 with no restriction of language. The inverse variance method and the random effect model were used to combine the data. The values of odds ratio (OR) were estimated at 95% confidence interval (CI).

resultsA total of 9 case-control and 3 cross-sectional studies were included in our systematic review. However, 11 of these 12 articles were entered into the meta-analysis containing 9873 participants, out of whom 389 were with OCD (25.96% positive for toxoplasmosis) and 9484 were without OCD (17.12% positive for toxoplasmosis). The estimation of the random effect model indicated a significant common OR of 1.96 [95% CI: 1.32-2.90].

conclusionThis systematic review and meta-analysis revealed that toxoplasmosis could be as an associated factor for OCD (OR = 1.96). However, further prospective investigations are highly recommended to illuminate the underlying pathophysiological mechanisms of T. gondii infection in OCD and to better investigate the relationship between OCD and T. gondii infection.

Indexed as

Disease SusceptibilityAntibodies, ProtozoanCase-Control StudiesCross-Sectional StudiesHumansObsessive-Compulsive DisorderOdds RatioToxoplasmaToxoplasmosisAntibodies, Protozoan

Identifiers

PMID30969961
PMCPMC6457543
OpenAlexW2936339519

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.