Evidence map›Paper›PMID 31775832›Full record

ArticleParasites & vectors2019

Use of next-generation amplicon sequencing to study Blastocystis genetic diversity in a rural human population from Mexico.

Liliana Rojas-Velázquez, Jenny G Maloney, Aleksey Molokin, Patricia Morán, Angélica Serrano-Vázquez, Enrique González, Horacio Pérez-Juárez, Cecilia Ximénez, Monica Santin

Abstract read
In one paragraph

Article in Parasites & vectors, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
–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

24 citing papers in PubMed.

  1. Commensal, pathogen, or passenger? Rethinking the role ofOne health (Amsterdam, Netherlands) · 2025
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  4. ISME communications · 2025
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  6. A cross-sectional survey ofOne health (Amsterdam, Netherlands) · 2024
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  7. Subtype Distribution ofMicroorganisms · 2024
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  8. Molecular Prevalence and Subtypes Distribution ofTropical medicine and infectious disease · 2024
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  12. Diversity ofMicroorganisms · 2022
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Wide Genetic Diversity ofMicroorganisms · 2021
    Article
  18. Article
  19. Article
  20. Microorganisms · 2021
    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

9 authors.

Liliana Rojas-VelázquezUnidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico.
Jenny G MaloneyEnvironmental Microbial and Food Safety Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, USA.
Aleksey MolokinEnvironmental Microbial and Food Safety Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, USA.
Patricia MoránUnidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico.
Angélica Serrano-VázquezUnidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico.
Enrique GonzálezUnidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico.
Horacio Pérez-JuárezUnidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico.
Cecilia XiménezUnidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico. cximenez@unam.mx.
Monica SantinEnvironmental Microbial and Food Safety Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD, USA. Monica.Santin-Duran@ars.usda.gov.

Funding

CONACYT 348424/239901Consejo Estatal de Ciencia, Tecnología e Innovación 00257091Consejo Estatal de Ciencia, Tecnología e Innovación 0362010Consejo Estatal de Ciencia, Tecnología e Innovación 2016-1 272601Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México IN215018Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México IN218214Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México N202408
6 · The paper itself

Abstract

backgroundThe intestinal parasite Blastocystis is found in humans and animals around the world. It is spread through the consumption of contaminated food and water and has been associated with a variety of intestinal symptoms. Blastocystis is one of the most common intestinal parasites in humans, yet its prevalence and distribution in humans in North America is not well characterized.

methodsNext-generation amplicon sequencing of a region of the Blastocystis SSU rRNA gene was applied to DNA extracted from fecal specimens obtained from 182 inhabitants of a rural population in Mexico to characterize Blastocystis prevalence, subtype distribution, and intra-host subtype diversity in humans.

resultsOf the 182 samples tested in this study, 68.1% (124) contained one or more Blastocystis subtypes. Subtype 3 was the most common subtype observed and was found in 81.5% of the positive samples. Subtype 1, 16.9% of the positive samples, and subtype 2, 17.7% of the positive samples, were also found in this population. Mixed infections were observed in 13.7% of the positive samples. In this population, the odds of having Blastocystis increased in adulthood (> 15 years; OR: 1.72, P < 0.0001), and the odds of having subtype 1 increased in the presence of farm animals (OR: 1.51, P = 0.03). The odds of having subtype 1, subtype 2, or a mixed infection decreased in the presence of cement flooring (OR: - 1.61, P = 0.005; OR: - 1.14, P = 0.03; OR: - 1.48, P = 0.02) possibly indicating socioeconomic factors are involved in the risk of acquiring one of these subtypes.

conclusionsThese data contribute to our understanding of the epidemiology of Blastocystis infection in humans and can be used to shape future studies which aim to better characterize the transmission pathways and health outcomes of Blastocystis infections.

Indexed as

Genetic VariationAdolescentAdultAnimalsBlastocystisBlastocystis InfectionsChildChild, PreschoolFecesFemaleHigh-Throughput Nucleotide SequencingHumansIntestinal Diseases, ParasiticMaleMexicoMiddle AgedBlastocystisHumanMexicoMixed infectionsNext-generation sequencingRisk factorsSubtypes

Identifiers

PMID31775832
PMCPMC6882168

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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.