Evidence map›Paper›PMID 35733146›Full record

SynthesisParasites & vectors2022

Current global status, subtype distribution and zoonotic significance of Blastocystis in dogs and cats: a systematic review and meta-analysis.

Morteza Shams, Laya Shamsi, Amirhosein Yousefi, Alireza Sadrebazzaz, Ali Asghari, Behnam Mohammadi-Ghalehbin, Saeed Shahabi, Gholamreza Hatam

Open access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Parasites & vectors, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
6.2field-weighted citation impact, top 2% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 37 citations in OpenAlex.

  1. Pooled it
  2. Prevalence and Genetic Characterization ofAnimals : an open access journal from MDPI · 2026
    Article
  3. Article
  4. Crossing the species barrier: Bidirectional transmission ofOne health (Amsterdam, Netherlands) · 2025
    Review
  5. Molecular identification and genotyping ofFood and waterborne parasitology · 2025
    Article
  6. Gastrointestinal Parasitic Infections inAnimals : an open access journal from MDPI · 2025
    Article
  7. Targeted-Amplicon NGS forVeterinary sciences · 2025
    Article
  8. Article
  9. Article
  10. Article
  11. Foodborne concerns ofFood and waterborne parasitology · 2024
    Review
  12. Article
  13. Article
  14. Marked genetic diversity withinInternational journal for parasitology. Parasites and wildlife · 2024
    Article
  15. Article
  16. Article
  17. Molecular Prevalence and Subtypes Distribution ofTropical medicine and infectious disease · 2024
    Review
  18. Prevalence and subtypes ofFrontiers in veterinary science · 2024
    Article
  19. Article
  20. Article
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

8 authors at 6 institutions in 1 country.

Morteza ShamsZoonotic Diseases Research Center, Ilam University of Medical Sciences, Ilam, Iran.
Laya ShamsiDepartment of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.
Amirhosein YousefiDepartment of Medical Lab Science, School of Medicine, Ardabil Branch, Islamic Azad University, Ardabil, Iran.
Alireza SadrebazzazEducation and Extension Organization, Razi Vaccine & Serum Research Institute, Agricultural Research, Mashhad, Iran.
Ali AsghariDepartment of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
Behnam Mohammadi-GhalehbinZoonoses Research Center (ZRC), Ardabil University of Medical Sciences, Ardabil, Iran.
Saeed ShahabiDepartment of Biology and Control of Disease Vectors, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran.
Gholamreza HatamBasic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. hatamghr@sums.ac.ir.
Shiraz University of Medical Sciences · IRArdabil University of Medical Sciences · IRIslamic Azad University Ardabil · IRMedical University of Ilam · IRRazi Vaccine and Serum Research Institute · IRUrmia University · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBlastocystis is a common intestinal protozoa found in animal and human fecal samples, with over 1 billion individuals infected worldwide. Since domestication, dogs and cats have had a close bond with humans. However, their close proximity poses a potential health risk since they may harbor several zoonotic agents. A global estimate of Blastocystis infection and subtype (ST) distribution in dogs and cats would therefore be of great health importance to humans.

methodsWe performed a comprehensive systematic search of four English-language databases (PubMed, Scopus, Google Scholar, Web of Science) for relevant articles up to 8 November 2021. The random-effects model was used to make pooled estimates with confidence intervals (CIs).

resultsIn total, we identified 49 publications that met our inclusion criteria and subsequently analyzed the 65 datasets in these articles, of which 23 and 42 datasets were on cats and dogs, respectively. Among the 2934 cats included in the 23 datasets, which involved 16 countries, the prevalence rate of Blastocystis infection was 9.3% (95% CI 5.3-15.9%). The prevalence of Blastocystis infection was slightly lower [7%, 95% CI 4.7-10.4%) among the 7946 dogs included in the 42 datasets, involving 23 countries. The sensitivity analysis showed that no remarkable variation in the estimates upon the stepwise removal of each dataset. Higher ST diversity was found among the examined dogs (ST1-8, ST10, ST23, ST24) than among cats (ST1-4, ST10, ST14). Among dogs, ST3 was the most frequent ST (41.3%), followed by ST2 (39.3%), ST1 (30.9%), ST4 (13.4%), ST8 (12.7%), ST10 (11%) and ST5 (8.1%). Also among dogs, each of ST6, ST7, ST23 and ST24 was observed in only one study. Of the ST found in the cats examined, ST4 (29.5%), followed by ST10 (22.5%), ST1 (19.8%) and ST3 (17.6%) were the most common. A single study also reported the presence of both ST2 and ST14 in cats. With respect to zoonotic Blastocystis STs (ST1-ST9 and ST12), eight were reported from dogs (ST1-ST8) and four were isolated from cats (ST1-ST4), showing the implication of dog and cats in zoonotic transmission.

conclusionsTaken together, our results show that elucidation of the true epidemiology and ST distribution of Blastocystis in dogs and cats demands more comprehensive studies, particularly in the negelected regions of the world.

Indexed as

BlastocystisBlastocystis InfectionsCat DiseasesDog DiseasesAnimalsCatsDNA, ProtozoanDogsFecesGenetic VariationInterleukin-1 Receptor-Like 1 ProteinPhylogenyPrevalenceDNA, ProtozoanInterleukin-1 Receptor-Like 1 ProteinBlastocystisCatsDistributionDogsMeta-analysisPrevalenceSubtypesSystematic review

Identifiers

PMID35733146
PMCPMC9215001
OpenAlexW4283277999

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.