Evidence map›Paper›PMID 39012065›Full record

ArticleEquine veterinary journal2025

Comparison of morphological and molecular Strongylus spp. identification in equine larval cultures and first report of a patent Strongylus asini infection in a horse.

Irina Diekmann, Katrin Blazejak, Jürgen Krücken, Christina Strube, Georg von Samson-Himmelstjerna

Abstract readComparative Study
In one paragraph

Article in Equine veterinary journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

7 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

5 authors.

Irina DiekmannInstitute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany.ORCID https://orcid.org/0000-0001-6637-7490
Katrin BlazejakInstitute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Hannover, Germany.
Jürgen KrückenInstitute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany.ORCID https://orcid.org/0000-0002-2842-8100
Christina StrubeInstitute for Parasitology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Hannover, Germany.ORCID https://orcid.org/0000-0002-9093-1006
Georg von Samson-HimmelstjernaInstitute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany.ORCID https://orcid.org/0000-0002-6043-2038

Funding

Deutsche Forschungsgemeinschaft 251133687/GRP2046
6 · The paper itself

Abstract

backgroundSurveillance of Strongylus vulgaris and other Strongylus spp. in equids is important for targeted intervention in parasite control, requiring reliable routine diagnostic methods.

objectivesComparing morphological examination and PCR analyses of larval cultures to identify Strongylus spp. species based on German diagnostic samples from 2018. STUDY

designMethod comparison.

methodsDuring the routine diagnostic investigations, in total 712 strongyle-egg positive equine faecal samples were cultured. Third-stage larvae (L3) were morphologically differentiated. For molecular validation, samples were examined using S. vulgaris real-time PCR and Strongylus edentatus/Strongylus equinus/Strongylus asini high-resolution melting PCRs.

resultsBased on 28S rRNA PCR, 594 samples positive for nematode DNA were included in the study. The inter-rater reliability to compare morphological and molecular species identification was fair for Strongylus spp. without species identification and for S. edentatus, slight for S. equinus and poor for S. vulgaris. The frequency based on morphological and molecular data in this study were for S. vulgaris 0% and 0.8%, respectively, for S. edentatus 0.3% and 1.5%, respectively, and for S. equinus 2.0% and 0.2%, respectively. Based on molecular analyses, one sample obtained from a domestic horse contained S. asini DNA, which was confirmed by sequencing. MAIN LIMITATIONS: For many samples, no or only incomplete data regarding clinical history, the exact geographical location and whether samples were obtained on individual or farm level, were available.

conclusionsResults of morphological and molecular examination methods of strongyle L3 from equine samples can differ substantially. Further evaluation of these methods is required to provide reliable and cost-effective methods of screening equine parasites. Further studies using approaches suitable to detect S. asini are needed to evaluate its clinical and epidemiological relevance.

Indexed as

Horse DiseasesStrongyle Infections, EquineStrongylusAnimalsFecesHorsesLarvaReal-Time Polymerase Chain ReactionGermanyhorselarge strongylelarval cultureStrongylus spp.

Identifiers

PMID39012065
PMCPMC11807925

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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.