Toxoplasmosis associated with Down syndrome: A global meta-analytic exploration of elevated infection risk and immune dysfunction | ||||
Parasitologists United Journal | ||||
Articles in Press, Accepted Manuscript, Available Online from 02 September 2025 | ||||
Document Type: Review Article | ||||
DOI: 10.21608/puj.2025.402069.1306 | ||||
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Authors | ||||
Bahareh Basirpour1; Sara Gholami2; Bahman Rahimi Esboei2; Shahabeddin Sarvi3; Shirzad Gholami3; Mostafa Tork3; Mitra Sadeghi3; Ahmad Daryani3; Seyed Abdollah Hosseini ![]() | ||||
1Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran | ||||
2Toxoplasmosis Research Center, Department of Parasitology, Mazandaran University of Medical Sciences, Sari, Iran | ||||
3Toxoplasmosis Research Center, Communicable Diseases Institute, Department of Parasitology, Mazandaran University of Medical Sciences, Sari, Iran | ||||
4Laboratory of Molecular Parasitology, Scientific Center of Zooloy and Hydroecology, NASRA, 7P. Sevak st. Yerevan 0014, Republic of Armenia | ||||
Abstract | ||||
Down syndrome (DS) is a genetic condition marked by the presence of an additional copy of chromosome 21, often associated with intellectual disability and other neurologic disorders. Patients with DS exhibit heightened susceptibility to infectious diseases, including toxoplasmosis, attributable to immune dysregulation, and anatomical variations. This systematic review screened existing evidence to evaluate prevalence and the potential association between toxoplasmosis and DS. Following the PRISMA guidelines, an electronic search was conducted across major databases such as PubMed, Web of Science, ScienceDirect, Scopus, EMBASE, and Google Scholar, up to May 2025. The search strategy aimed to identify all relevant studies on Toxoplasma gondii (T. gondii) and DS. The pooled prevalence of T. gondii seropositivity among DS patients, as well as the pooled odds ratio, was calculated using the random-effects model in StatsDirect software. The present review underscores a significant epidemiological signal warranting heightened clinical awareness. | ||||
Keywords | ||||
Down syndrome; Seroprevalence; Toxoplasmosis | ||||
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