Evidence map›Paper›PMID 25889266›Full record

ArticleParasites & vectors2015

Detection of the myxosporean parasite Parvicapsula pseudobranchicola in Atlantic salmon (Salmo salar L.) using in situ hybridization (ISH).

Turhan Markussen, Celia Agusti, Egil Karlsbakk, Are Nylund, Øyvind Brevik, Haakon Hansen

Abstract readEvaluation Study
In one paragraph

Article in Parasites & vectors, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing 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

4 citing papers in PubMed.

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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

6 authors.

Turhan MarkussenNorwegian Veterinary Institute, P.O. Box 750 Sentrum, , N-0106, Oslo, Norway. turhan.markussen@vetinst.no.
Celia AgustiNorwegian Veterinary Institute, P.O. Box 750 Sentrum, , N-0106, Oslo, Norway. celia.agusti@nmbu.no.
Egil KarlsbakkInstitute of Marine Research, P.O. Box 1870, , Nordnes, 5817, Bergen, Norway. egil.karlsbakk@imr.no.
Are NylundDepartment of Biology, University of Bergen, Thormøhlensgt 55, N-5020, Bergen, Norway. are.nylund@bio.uib.no.
Øyvind BrevikCermaq Group AS, Dronning Eufemias gate 16, N-0191, Oslo, Norway. oyvind.brevik@cermaq.com.
Haakon HansenNorwegian Veterinary Institute, P.O. Box 750 Sentrum, , N-0106, Oslo, Norway. haakon.hansen@vetinst.no.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundParvicapsula pseudobranchicola is a marine myxosporean parasite infecting farmed Atlantic salmon (Salmo salar). A major site for the parasite is the pseudobranch, which may be destroyed in heavily infected fish. Parvicapsulosis may be associated with significant mortality, although the main effect of infections seems to be runting. In situ hybridization (ISH) is, in the absence of specific antibodies, the preferred method for the detection of cell- and tissue tropisms of myxozoans in the early phases of infection of the host, and provides information about the possible association between the pathogen and pathology. A positive diagnosis of parvicapsulosis is based on histopathology and PCR. The aim of the present work was to develop a specific, sensitive and robust ISH assay for the detection of P. pseudobranchicola in tissues.

methodsThe ISH method was designed to specifically target P. pseudobranchicola 18S rDNA/rRNA using a locked nucleic acid (LNA) modified oligonucleotide probe. The method was tested on paraffin embedded P. pseudobranchicola infected pseudobranchs. The infections were confirmed by light microscopy revealing the presence of typical P. pseudobranchicola trophozoites and spores, and the presence of parasite was confirmed with real-time RT-PCR.

resultsSpecific regions stained by ISH overlapped well with the parasitized and degenerated regions in neighbouring HE stained sections. No staining was observed in pseudobranchs of Atlantic salmon which had been held in P. pseudobranchicola-free water.

conclusionsWe report here the development of a sensitive ISH assay for the detection of P. pseudobranchicola in paraffin embedded tissue. The technique will be valuable in the study of host entry, early proliferation, pre-spore development, pathology and tissue tropism in Atlantic salmon.

Indexed as

AnimalsDNA, ProtozoanDNA, RibosomalFish DiseasesIn Situ HybridizationMolecular Diagnostic TechniquesMyxozoaOligonucleotide ProbesParasitic Diseases, AnimalParasitologyRNA, Ribosomal, 18SSalmo salarSensitivity and SpecificityVeterinary MedicineDNA, ProtozoanDNA, RibosomalOligonucleotide ProbesRNA, Ribosomal, 18S

Identifiers

PMID25889266
PMCPMC4334612

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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.