Evidence map›Paper›PMID 26800683›Full record

ArticleParasites & vectors2016

Whipworms in humans and pigs: origins and demography.

Mohamed B F Hawash, Martha Betson, Azmi Al-Jubury, Jennifer Ketzis, Arve LeeWillingham, Mads F Bertelsen, Philip J Cooper, D Tim J Littlewood, Xing-Quan Zhu, Peter Nejsum

Open access · goldAbstract read
In one paragraph

Article in Parasites & vectors, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

13 citing papers in PubMed, 38 citations in OpenAlex.

  1. Article
  2. Article
  3. Prevalences and Characteristics ofJournal of veterinary research · 2022
    Article
  4. Article
  5. Article
  6. Article
  7. Nuclear and Mitochondrial Data onLife (Basel, Switzerland) · 2020
    Article
  8. Article
  9. Whipworm and roundworm infections.Nature reviews. Disease primers · 2020
    Review
  10. Article
  11. Article
  12. Probiotics for the Control of Helminth Zoonosis.Journal of veterinary medicine · 2018
    Review
  13. 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

10 authors at 7 institutions in 5 countries.

Mohamed B F HawashDepartment of Veterinary Disease Biology, Faculty of Health Sciences, Copenhagen University, Dyrlaegevej 100, DK-1870, Frederiksberg C, Copenhagen, Denmark. mfahmy@sci.cu.edu.eg.
Martha BetsonDepartment of Production and Population Health, Royal Veterinary College, Hatfield, Hertfordshire, UK. m.betson@surrey.ac.uk.
Azmi Al-JuburyDepartment of Veterinary Disease Biology, Faculty of Health Sciences, Copenhagen University, Dyrlaegevej 100, DK-1870, Frederiksberg C, Copenhagen, Denmark. azmi_mmbb@yahoo.com.
Jennifer KetzisRoss University School of Veterinary Medicine, West Indies, Basseterre, St Kitts and Nevis. JKetzis@RossU.edu.
Arve LeeWillinghamRoss University School of Veterinary Medicine, West Indies, Basseterre, St Kitts and Nevis. awillingham@rossvet.edu.kn.
Mads F BertelsenCentre for Zoo and Wild Animal Health, Copenhagen Zoo, Frederiksberg, Copenhagen, Denmark. mfb@zoo.dk.
Philip J CooperInstitute of Infection and Immunity, St George's University of London, London, UK. Phil.Cooper@lstmed.ac.uk.
D Tim J LittlewoodDepartment of Life Sciences, Natural History Museum, London, UK. t.littlewood@nhm.ac.uk.
Xing-Quan ZhuLanzhou Veterinary Research Institute, State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, P R China. xingquanzhu1@hotmail.com.
Peter NejsumDepartment of Veterinary Disease Biology, Faculty of Health Sciences, Copenhagen University, Dyrlaegevej 100, DK-1870, Frederiksberg C, Copenhagen, Denmark. pn@sund.ku.dk.
University of Copenhagen · DKRoss University School of Veterinary Medicine · KNCopenhagen Zoo · DKLanzhou Veterinary Research Institute · CNNatural History Museum · GBRoyal Veterinary College · GBSt George's, University of London · GB

Funding

The Southwest National Primate Research Center Supplement- Infrastructure improvements of ABSL2 holding areasP51OD011133 · OD · TEXAS BIOMEDICAL RESEARCH INSTITUTE · PI Larry S. Schlesinger · 2012 to 2026
$129.7M
NIH HHS P51 OD011133Wellcome Trust 088862Wellcome Trust 088862/Z/09/Z
6 · The paper itself

Abstract

backgroundTrichuris suis and T. trichiura are two different whipworm species that infect pigs and humans, respectively. T. suis is found in pigs worldwide while T. trichiura is responsible for nearly 460 million infections in people, mainly in areas of poor sanitation in tropical and subtropical areas. The evolutionary relationship and the historical factors responsible for this worldwide distribution are poorly understood. In this study, we aimed to reconstruct the demographic history of Trichuris in humans and pigs, the evolutionary origin of Trichuris in these hosts and factors responsible for parasite dispersal globally.

methodsParts of the mitochondrial nad1 and rrnL genes were sequenced followed by population genetic and phylogenetic analyses. Populations of Trichuris examined were recovered from humans (n = 31), pigs (n = 58) and non-human primates (n = 49) in different countries on different continents, namely Denmark, USA, Uganda, Ecuador, China and St. Kitts (Caribbean). Additional sequences available from GenBank were incorporated into the analyses.

resultsWe found no differentiation between human-derived Trichuris in Uganda and the majority of the Trichuris samples from non-human primates suggesting a common African origin of the parasite, which then was transmitted to Asia and further to South America. On the other hand, there was no differentiation between pig-derived Trichuris from Europe and the New World suggesting dispersal relates to human activities by transporting pigs and their parasites through colonisation and trade. Evidence for recent pig transport from China to Ecuador and from Europe to Uganda was also observed from their parasites. In contrast, there was high genetic differentiation between the pig Trichuris in Denmark and China in concordance with the host genetics.

conclusionsWe found evidence for an African origin of T. trichiura which were then transmitted with human ancestors to Asia and further to South America. A host shift to pigs may have occurred in Asia from where T. suis seems to have been transmitted globally by a combination of natural host dispersal and anthropogenic factors.

Indexed as

AnimalsBase SequenceBiological EvolutionChinaDemographyDenmarkDNA, HelminthDNA, MitochondrialEcuadorGenetics, PopulationHumansMolecular Sequence DataPhylogenyPrimatesSequence Analysis, DNASwineDNA, HelminthDNA, Mitochondrial

Identifiers

PMID26800683
PMCPMC4724142
OpenAlexW2253547337

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.