SynthesisParasites & vectors2020
Prevalence of Blastocystis sp. infection in several hosts in Brazil: a systematic review and meta-analysis.
Synthesis in Parasites & vectors, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.
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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.
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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.
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Who cites it
22 citing papers in PubMed, 1 synthesis or guideline pooled it, 42 citations in OpenAlex.
- Worldwide prevalence of protozoans and helminths among disabled people: a systematic review and meta-analysis.BMC public health · 2025Pooled it
- No Trace of Blastocystis Parasite in Bats Caught in the Western and Southwestern Regions of Iran.Veterinary medicine and science · 2026Article
- ExploringJournal of medical microbiology · 2026Review
- Isolation and Characterization of a Biocontrol Serine Protease fromBiomolecules · 2026Article
- Commensal, pathogen, or passenger? Rethinking the role ofOne health (Amsterdam, Netherlands) · 2025Review
- Molecular evidence ofParasite epidemiology and control · 2025Article
- The Role ofPathogens (Basel, Switzerland) · 2025Review
- Molecular Screening and Characterization of Enteric Protozoan Parasites and Microsporidia in Wild Ducks from Portugal.Animals : an open access journal from MDPI · 2024Article
- Foodborne concerns ofFood and waterborne parasitology · 2024Review
- Molecular Prevalence and Subtypes Distribution ofTropical medicine and infectious disease · 2024Review
- A Thorny Tale of Parasites: Screening for Enteric Protozoan Parasites in Hedgehogs from Portugal.Animals : an open access journal from MDPI · 2024Article
- Systematic Review and Meta-Analysis: Epidemiology of HumanTropical medicine and infectious disease · 2023Review
- Extensive prevalence and significant genetic differentiation of Blastocystis in high- and low-altitude populations of wild rhesus macaques in China.Parasites & vectors · 2023Article
- An Association Between Blastocystis Subtypes and Colorectal Cancer Patients: A Significant Different Profile from Non-cancer Individuals.Acta parasitologica · 2022Article
- Spurious infection by Calodium hepaticum (Bancroft, 1983) Moravec, 1982 and intestinal parasites in forest reserve dwellers in Western Brazilian Amazon.Revista do Instituto de Medicina Tropical de Sao Paulo · 2022Article
- Subtype distribution ofGastroenterology and hepatology from bed to bench · 2022Review
- The Coexistence ofBiology · 2021Review
- Epidemiological and Molecular Characterization ofBiology · 2021Article
- In vitro susceptibility of humanSaudi journal of biological sciences · 2021Article
- Molecular characterization of Blastocystis subtypes isolated in the city of Uberaba, Minas Gerais State, Brazil.Revista da Sociedade Brasileira de Medicina Tropical · 2021Article
Corrections and comments
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Authors and funding
10 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundBlastocystis sp. affects a wide variety of animals and is the most common protozoan in human fecal samples with potential pandemic distribution. In the present study, a systematic review and meta-analysis were conducted to determine the prevalence and distribution of Blastocystis sp. in different classes of hosts in Brazil.
methodsStudies that analyzed hosts of various classes, including humans, domestic animals, wild animals or captive animals, were considered. The pooled prevalence of Blastocystis sp. infection was estimated by random effects models.
resultsFor humans, similar prevalence rates were found for males (31.0%, 95% CI: 17.0-45.0%; weight 10%) and females (28.0%, 95% CI: 16.0-41.0%; weight 10%); the state of Mato Grosso do Sul showed the highest prevalence, with 41.0% positivity (95% CI: 36.0-46.0%; weight 2.9%). The prevalence among immunocompromised patients was 5.0% (95% CI: 3.0-7.0%; weight 10%), and the most common cause of immunosuppression was hemodialysis, with 23.0% (95% CI: 17.0-29.0%; weight 12.4%). Among classifications according to interaction with humans, wild and domestic animals presented values of 19.0% (95% CI: 7.0-31.0%; weight 42.6%) and 17.0% (95% CI: 13.0-21.0%; weight 29.6%), respectively. Among these animals, mammals (39.0%, 95% CI: 21.0-56.0%; weight 47.3%) and birds (18.0%, 95% CI: 10.0-27.0%; weight 39.3%) exhibited the highest prevalence. Phylogenetic analysis of Blastocystis sp. revealed greater genetic diversity for clades of subtypes (STs) ST1, ST2 and ST3.
conclusionsThe overall prevalence of Blastocystis sp. in the Brazilian human population was 24%, which reflects the reality in the South, Southeast and Midwest regions, where prevalence rates of up to 40% were found. Among animals, mammals and birds exhibited the highest prevalence.
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