Evidence map›Paper›PMID 30833731›Full record

ArticleNature microbiology2019

Evolutionary genomics of anthroponosis in Cryptosporidium.

Johanna L Nader, Thomas C Mathers, Ben J Ward, Justin A Pachebat, Martin T Swain, Guy Robinson, Rachel M Chalmers, Paul R Hunter, Cock van Oosterhout, Kevin M Tyler

Open access · greenAbstract read
PubMed Publisher
In one paragraph

Article in Nature microbiology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 84 papers.

0numbers the graph read from it
0cells of the map it votes in
84citing papers in PubMed
13.8field-weighted citation impact, top 1% 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

84 citing papers in PubMed, 146 citations in OpenAlex.

  1. Article
  2. Large-scale molecular epidemiological survey ofJournal of clinical microbiology · 2026
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  3. The role of autophagy in protozoan infections.Frontiers in cellular and infection microbiology · 2026
    Review
  4. Evolutionary Genomic Analyses of Cryptosporidium.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  5. Emergence of zoonoticFrontiers in microbiology · 2026
    Article
  6. The first appearance of the zoonotic parasiteEmerging microbes & infections · 2025
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  7. Article
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  13. Emergence ofMicroorganisms · 2025
    Article
  14. Article
  15. Article
  16. A review of recentCurrent research in parasitology & vector-borne diseases · 2025
    Review
  17. Article
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  19. Article
  20. Molecular detection ofInternational journal for parasitology. Parasites and wildlife · 2024
    Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 2 countries.

Johanna L NaderBiomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, UK. johanna.nader@fhi.no.ORCID http://orcid.org/0000-0002-2045-1269
Thomas C MathersEarlham Institute, Norwich Research Park, Norwich, UK.
Ben J WardEarlham Institute, Norwich Research Park, Norwich, UK.
Justin A PachebatInstitute of Biological, Environmental & Rural Sciences, Aberystwyth University, Aberystwyth, UK.
Martin T SwainInstitute of Biological, Environmental & Rural Sciences, Aberystwyth University, Aberystwyth, UK.
Guy RobinsonCryptosporidium Reference Unit, Public Health Wales Microbiology, Singleton Hospital, Swansea, UK.ORCID http://orcid.org/0000-0002-6594-2408
Rachel M ChalmersCryptosporidium Reference Unit, Public Health Wales Microbiology, Singleton Hospital, Swansea, UK.
Paul R HunterBiomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, UK.ORCID http://orcid.org/0000-0002-5608-6144
Cock van Oosterhout *School of Environmental Sciences, University of East Anglia, Norwich Research Park, Norwich, UK. c.van-oosterhout@uea.ac.uk.ORCID http://orcid.org/0000-0002-5653-738X
Kevin M Tyler *Biomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, UK.ORCID http://orcid.org/0000-0002-0647-8158
University of East Anglia · GBAberystwyth University · GBSingleton Hospital · GBJohn Innes Centre · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Human cryptosporidiosis is the leading protozoan cause of diarrhoeal mortality worldwide, and a preponderance of infections is caused by Cryptosporidium hominis and C. parvum. Both species consist of several subtypes with distinct geographical distributions and host preferences (that is, generalist zoonotic and specialist anthroponotic subtypes). The evolutionary processes that drive the adaptation to the human host and the population structures of Cryptosporidium remain unknown. In this study, we analyse 21 whole-genome sequences to elucidate the evolution of anthroponosis. We show that Cryptosporidium parvum splits into two subclades and that the specialist anthroponotic subtype IIc-a shares a subset of loci with C. hominis that is undergoing rapid convergent evolution driven by positive selection. C. parvum subtype IIc-a also has an elevated level of insertion and deletion mutations in the peri-telomeric genes, which is also a characteristic of other specialist subtypes. Genetic exchange between Cryptosporidium subtypes plays a prominent role throughout the evolution of the genus. Interestingly, recombinant regions are enriched for positively selected genes and potential virulence factors, which indicates adaptive introgression. Analysis of 467 gp60 sequences collected from locations across the world shows that the population genetic structure differs markedly between the main zoonotic subtype (isolation-by-distance) and the anthroponotic subtype (admixed population structure). We also show that introgression between the four anthroponotic Cryptosporidium subtypes and species included in this study has occurred recently, probably within the past millennium.

Indexed as

Evolution, MolecularGenome, ProtozoanAnimalsCryptosporidiosisCryptosporidiumDNA, ProtozoanGenomicsGenotypeHumansMutationPhylogenyPolymorphism, Single NucleotideProtozoan ProteinsRuminantsZoonosesDNA, ProtozoanProtozoan Proteins

Identifiers

PMID30833731
OpenAlexW2918250143

What Socratic holds

Textmetadata
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 Socratic graph.