Evidence map›Paper›PMID 29587877›Full record

ArticleParasites & vectors2018

Occurrence and distribution of Giardia species in wild rodents in Germany.

Yosra A Helmy, Nastasja G Spierling, Sabrina Schmidt, Ulrike M Rosenfeld, Daniela Reil, Christian Imholt, Jens Jacob, Rainer G Ulrich, Toni Aebischer, Christian Klotz

Open access · goldAbstract read
In one paragraph

Article in Parasites & vectors, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 2 pooled it
4.1field-weighted citation impact, top 6% 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

34 citing papers in PubMed, 2 syntheses or guidelines pooled it, 62 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Emergence of zoonoticFrontiers in microbiology · 2026
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  6. Prevalence and Genetic Diversity ofJournal of parasitology research · 2025
    Review
  7. Enumerating genotypic diversity and host specificity of GInternational journal for parasitology. Parasites and wildlife · 2024
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  8. Article
  9. Article
  10. Molecular characterization ofOne health (Amsterdam, Netherlands) · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Microorganisms · 2023
    Article
  16. Role of rodents in the zoonotic transmission of giardiasis.One health (Amsterdam, Netherlands) · 2023
    Review
  17. Article
  18. Detection and Molecular Characterization ofAnimals : an open access journal from MDPI · 2023
    Article
  19. Article
  20. Review
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 5 institutions in 2 countries.

Yosra A HelmyUnit 16 Mycotic and Parasitic Agents and Mycobacteria, Department of Infectious Diseases, Robert Koch-Institute, 13353, Berlin, Germany.
Nastasja G SpierlingInstitute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493, Greifswald - Insel Riems, Germany.
Sabrina SchmidtInstitute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493, Greifswald - Insel Riems, Germany.
Ulrike M RosenfeldInstitute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493, Greifswald - Insel Riems, Germany.
Daniela ReilInstitute for Plant Protection in Horticulture and Forests, Vertebrate Research, Julius Kühn-Institute, Federal Research Centre for Cultivated Plants, 48161, Münster, Germany.
Christian ImholtInstitute for Plant Protection in Horticulture and Forests, Vertebrate Research, Julius Kühn-Institute, Federal Research Centre for Cultivated Plants, 48161, Münster, Germany.
Jens JacobInstitute for Plant Protection in Horticulture and Forests, Vertebrate Research, Julius Kühn-Institute, Federal Research Centre for Cultivated Plants, 48161, Münster, Germany.
Rainer G UlrichInstitute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493, Greifswald - Insel Riems, Germany.
Toni AebischerUnit 16 Mycotic and Parasitic Agents and Mycobacteria, Department of Infectious Diseases, Robert Koch-Institute, 13353, Berlin, Germany.
Christian KlotzUnit 16 Mycotic and Parasitic Agents and Mycobacteria, Department of Infectious Diseases, Robert Koch-Institute, 13353, Berlin, Germany. klotzc@rki.de.
Friedrich-Loeffler-Institut · DEJulius Kühn-Institut · DERobert Koch Institute · DESuez Canal University · EGWest German Heart and Vascular Center Essen · DE

Funding

Bundesministerium für Bildung und Forschung 01KI1303Bundesministerium für Bildung und Forschung FKZ 01KI1018Bundesministerium für Bildung und Forschung FKZ 01KI1019Bundesministerium für Umwelt, Naturschutz, Bau und Reaktorsicherheit FKZ 370941401
6 · The paper itself

Abstract

backgroundGiardiasis is an important gastrointestinal parasitic disease in humans and other mammals caused by the protozoan Giardia duodenalis. This species complex is represented by genetically distinct groups (assemblages A-H) with varying zoonotic potential and host preferences. Wild rodents can harbor potentially zoonotic assemblages A and B, and the rodent-specific assemblage G. Other Giardia spp. found in these animals are Giardia muris and Giardia microti. For the latter, only limited information on genetic typing is available. It has been speculated that wild rodents might represent an important reservoir for parasites causing human giardiasis. The aim of this study was to investigate the occurrence and distribution of Giardia spp. and assemblage types in wild rodents from different study sites in Germany.

resultsScreening of 577 wild rodents of the genera Apodemus, Microtus and Myodes, sampled at eleven study sites in Germany, revealed a high overall Giardia prevalence. Giardia species determination at the SSU rDNA gene locus revealed that Apodemus mice, depending on species, were predominantly infected with one of two distinct G. muris sequence types. Giardia microti was the predominant parasite species found in voles of the genera Microtus and Myodes. Only a few animals were positive for potentially zoonotic G. duodenalis. Subtyping at the beta-giardin (bg) and glutamine dehydrogenase (gdh) genes strongly supported the existence of different phylogenetic subgroups of G. microti that are preferentially harbored by distinct host species.

conclusionsThe present study highlights the preference of G. muris for Apodemus, and G. microti for Microtus and Myodes hosts and argues for a very low prevalence of zoonotic G. duodenalis assemblages in wild rodents in Germany. It also provides evidence that G. muris and G. microti subdivide into several phylogenetically distinguishable subgroups, each of which appears to be preferentially harbored by species of a particular rodent host genus. Finally, the study expands the database of sequences relevant for sequence typing of G. muris and G. microti isolates which will greatly help future analyses of these parasites' population structure.

Indexed as

AnimalsArvicolinaeCluster AnalysisDNA, ProtozoanDNA, RibosomalGenotypeGermanyGiardiaGiardiasisHost SpecificityMurinaePhylogenyPrevalenceRNA, Ribosomal, 18SRodent DiseasesSequence Analysis, DNADNA, ProtozoanDNA, RibosomalRNA, Ribosomal, 18SGiardia spp.Protozoan infectionReservoirSequence typingWild rodents

Identifiers

PMID29587877
PMCPMC5870188
OpenAlexW2799401309

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.