Evidence map›Paper›PMID 22389374›Full record

ArticleApplied and environmental microbiology2012

Evidence of host-associated populations of Cryptosporidium parvum in Italy.

Rosanna Drumo, Giovanni Widmer, Liam J Morrison, Andy Tait, Vincenzo Grelloni, Nicoletta D'Avino, Edoardo Pozio, Simone M Cacciò

Erratum issuedOpen access · bronzeAbstract read
In one paragraph

Article in Applied and environmental microbiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
5.2field-weighted citation impact, top 4% 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

31 citing papers in PubMed, 67 citations in OpenAlex.

  1. Article
  2. Molecular and Epidemiological Investigation ofPathogens (Basel, Switzerland) · 2025
    Article
  3. Article
  4. Article
  5. Molecular Detection and Distribution ofTransboundary and emerging diseases · 2023
    Article
  6. Transmission of Cryptosporidium Species Among Human and Animal Local Contact Networks in Sub-Saharan Africa: A Multicountry Study.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2021
    Article
  7. Article
  8. Article
  9. Direct Sequencing ofFrontiers in public health · 2019
    Review
  10. Article
  11. Sheep as a Potential Source of Zoonotic Cryptosporidiosis in China.Applied and environmental microbiology · 2018
    Article
  12. Article
  13. Article
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  15. Article
  16. Article
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4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

8 authors at 4 institutions in 3 countries.

Rosanna DrumoDepartment of Infectious, Parasitic and Immunomediated Diseases, Istituto Superiore di Sanità, Rome, Italy.
Giovanni Widmer
Liam J Morrison
Andy Tait
Vincenzo Grelloni
Nicoletta D'Avino
Edoardo Pozio
Simone M Cacciò
Istituto Superiore di Sanità · ITIstituto Zooprofilattico Sperimentale dell'Umbria e delle Marche · ITWellcome Trust · GBNew England Disabled Sports · US

Funding

Genetics of Cryptosporidium parvumR01AI052781 · NIAID · TUFTS UNIVERSITY BOSTON · PI WIDMER, GIOVANNI · 2002 to 2010
$1.8M
Genetics of Cryptosporidium parvumR56AI052781 · NIAID · TUFTS UNIVERSITY BOSTON · PI WIDMER, GIOVANNI · 2008 to 2008
$293k
NIAID NIH HHS AI052781NIAID NIH HHS R01 AI052781NIAID NIH HHS R56 AI052781Wellcome Trust 085349
6 · The paper itself

Abstract

Recent studies have revealed extensive genetic variation among isolates of Cryptosporidium parvum, an Apicomplexan parasite that causes gastroenteritis in both humans and animals worldwide. The parasite's population structure is influenced by the intensity of transmission, the host-parasite interaction, and husbandry practices. As a result, C. parvum populations can be panmictic, clonal, or even epidemic on both a local scale and a larger geographical scale. To extend the study of C. parvum populations to an unexplored region, 173 isolates of C. parvum collected in Italy from humans and livestock (calf, sheep, and goat) over a 10-year period were genotyped using a multilocus scheme based on 7 mini- and microsatellite loci. In agreement with other studies, extensive polymorphism was observed, with 102 distinct multilocus genotypes (MLGs) identified among 173 isolates. The presence of linkage disequilibrium, the confinement of MLGs to individual farms, and the relationship of many MLGs inferred using network analysis (eBURST) suggest a predominantly clonal population structure, but there is also evidence that part of the diversity can be explained by genetic exchange. MLGs from goats were found to differ from bovine and sheep MLGs, supporting the existence of C. parvum subpopulations. Finally, MLGs from isolates collected between 1997 and 1999 were also identified as a distinct subgroup in principal-component analysis and eBURST analysis, suggesting a continuous introduction of novel genotypes in the parasite population.

Indexed as

Genetic VariationAnimalsCattleCluster AnalysisCryptosporidiosisCryptosporidium parvumGenotypeGoatsHumansItalyMicrosatellite RepeatsMolecular EpidemiologySheep

Identifiers

PMID22389374
PMCPMC3346357
OpenAlexW2049428914

What OpenQuestion 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 OpenQuestion graph.