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ArticleParasitology research2014

Molecular characterisation of Sarcocystis rileyi from a common eider (Somateria mollissima) in Norway.

Bjørn Gjerde

Abstract read
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In one paragraph

Article in Parasitology research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing 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

49 citing papers in PubMed.

  1. High Diversity ofAnimals : an open access journal from MDPI · 2026
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  8. Description ofPathogens (Basel, Switzerland) · 2025
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  9. Morphological and Molecular Description ofAnimals : an open access journal from MDPI · 2025
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  10. European Pine Marten (Veterinary sciences · 2025
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  14. Detection ofFrontiers in veterinary science · 2025
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  15. A putative newInternational journal for parasitology. Parasites and wildlife · 2024
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  18. Animals : an open access journal from MDPI · 2023
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  19. Protozoan Parasites ofAnimals : an open access journal from MDPI · 2023
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  20. Molecular Confirmation ofPathogens (Basel, Switzerland) · 2023
    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

1 author.

Bjørn GjerdeDepartment of Food Safety and Infection Biology, Norwegian University of Life Sciences, P.O. Box 8146 Dep., 0033, Oslo, Norway, bjorn.gjerde@nmbu.no.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The breast and leg muscles of a common eider (Somateria mollissima; Anatidae: Anseriformes) from northern Norway contained numerous grossly visible cigar-shaped sarcocysts measuring about 5 × 1 mm. Light microscopic examination of isolated sarcocysts revealed that they were encapsulated by a thin fibrous layer, underneath which there was a thin and fairly smooth cyst wall with no visible protrusions. The cystozoites were straight, spindle-shaped and about 13 μm long. Genomic DNA was extracted from 12 excised sarcocysts and each DNA isolate was subjected to PCR amplification of one to four loci: the 18S and 28S ribosomal RNA genes (four isolates), the internal transcribed spacer 1 (ITS1) region (six isolates) and the mitochondrial cytochrome c oxidase subunit 1 gene (cox1) (12 isolates). At the three nuclear loci, the new sequences showed 99.9-100% sequence identity with previous sequences of Sarcocystis rileyi from the mallard duck in Lithuania and USA, and they could therefore be assigned to this species. At cox1, the new sequences of S. rileyi were most similar to Sarcocystis arctica and Sarcocystis neurona, but the most closely related Sarcocystis spp. in birds have not been sequenced at this locus. There was no sequence variation at any locus between the 4-12 examined isolates of S. rileyi. This is the first genetically verified record of S. rileyi in the common eider, as well as in any bird species in Norway. The phylogenetic placement of S. rileyi was inferred separately from 28S rRNA gene and cox1 sequences, and similar results were obtained in both analyses.

Indexed as

DucksAnimalsCyclooxygenase 1DNA, IntergenicDNA, ProtozoanGene Expression Regulation, EnzymologicGenetic VariationMicroscopyNorwayPhylogenyPolymerase Chain ReactionRNA, Ribosomal, 18SRNA, Ribosomal, 28SSarcocystisSarcocystosisCyclooxygenase 1DNA, IntergenicDNA, ProtozoanRNA, Ribosomal, 18SRNA, Ribosomal, 28S

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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.