Evidence map›Paper›PMID 22741573›Full record

ArticleParasites & vectors2012

Blastocystis sp.: waterborne zoonotic organism, a possibility?

Li Ii Lee, Tan Tian Chye, Biraj Man Karmacharya, Suresh Kumar Govind

Abstract read
In one paragraph

Article in Parasites & vectors, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

68 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Genetic diversity and zoonotic transmission potential ofParasite epidemiology and control · 2026
    Review
  3. Article
  4. Microbial and Chemical Water Quality Assessments Across the Rural and Urban Areas of Nepal: A Scoping Review.International journal of environmental research and public health · 2025
    Article
  5. Article
  6. Assessing Zoonotic Risks ofPathogens (Basel, Switzerland) · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. An Update onMicroorganisms · 2024
    Review
  11. Article
  12. Article
  13. Article
  14. Molecular Prevalence ofMicroorganisms · 2024
    Article
  15. Detection and Molecular Characterization ofInternational journal of molecular sciences · 2023
    Article
  16. Article
  17. Epidemiology ofPathogens (Basel, Switzerland) · 2023
    Review
  18. Article
  19. Article
  20. Antiprotozoal activity ofVeterinary world · 2023
    Article

8 more citing papers are in PubMed but not listed here.

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

4 authors.

Li Ii LeeDepartment of Parasitology, Faculty of Medicine, University of Malaya, Kuala Lumpur, 50603, Malaysia.
Tan Tian Chye
Biraj Man Karmacharya
Suresh Kumar Govind

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBlastocystis sp. is a common intestinal parasite found in faecal sample surveys. Several studies have implicated human-to-human, zoonotic and waterborne transmissions by Blastocystis sp. However, there has been no study providing evidence interlinking these three transmissions in a community. We have previously shown a high prevalence of Blastocystis sp. subtype 4 amongst village dwellers in Bahunipati, Nepal, and the present study extends the observation to assess if the same subtype of Blastocystis sp. occurs in animals they rear and rivers they frequent.

methodsFaecal samples were collected from 65 animals. Four river water samples were collected from two rivers. Faecal samples were examined using in vitro cultivation. Blastocystis sp. from animal faecal and river samples were genotyped using seven subtype-specific sequence tagged site (STS) primer-polymerase chain reaction (PCR).

resultsBlastocystis sp. infected 15.4% animals with subtype 4 being the predominant genotype (40.0%). Both rivers were contaminated with Blastocystis sp. subtype 1 and subtype 4, which were also detected in humans living in the same village in our previous study. Blastocystis sp. subtype 4 that was detected in buffalo and pigs was also found in the respective family members that reared these animals.

conclusionsThis unusually high prevalence of Blastocystis subtype 4 found in village dwellers was also found to be pervasive in the animals they reared and the rivers they frequented implying a strong possibility of waterborne zoonosis for Blastocystis sp.

Indexed as

AnimalsBlastocystisCross-Sectional StudiesFecesHumansNepalRiversRuminantsRural PopulationSwineWaterWater

Identifiers

PMID22741573
PMCPMC3434050

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LicenceCC BY
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Registered trials

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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.