Evidence map›Paper›PMID 33670367›Full record

ArticleViruses2021

Elephant Endotheliotropic Herpesvirus Is Omnipresent in Elephants in European Zoos and an Asian Elephant Range Country.

Tabitha E Hoornweg, Willem Schaftenaar, Gilles Maurer, Petra B van den Doel, Fieke M Molenaar, Alexandre Chamouard-Galante, Francis Vercammen, Victor P M G Rutten, Cornelis A M de Haan

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In one paragraph

Article in Viruses, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
3.6field-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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 31 citations in OpenAlex.

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  16. Elephant Endotheliotropic Herpesvirus 4 andAnimals : an open access journal from MDPI · 2022
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  19. Exposure toPathogens (Basel, Switzerland) · 2021
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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

9 authors at 7 institutions in 5 countries.

Tabitha E HoornwegSection Virology, Division Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, The Netherlands.
Willem SchaftenaarVeterinary Advisor EAZA Elephant TAG, Rotterdam Zoo, 3041 JG Rotterdam, The Netherlands.
Gilles MaurerCenter for Functional and Evolutionary Ecology (CEFE), Univ. Montpellier, CNRS, EPHE, IRD, Univ. Paul Valéry Montpellier 3, 34090 Montpellier, France.ORCID 0000-0003-1057-5994
Petra B van den DoelViroScience Lab, Erasmus Medical Center, 3015 CN Rotterdam, The Netherlands.
Fieke M MolenaarZoological Society of London, ZSL Whipsnade Zoo, Dunstable LU6 2LF, Bedfordshire, UK.ORCID 0000-0001-9943-7381
Alexandre Chamouard-GalanteÉcole Nationale Vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Francis VercammenAntwerp Zoo Centre for Research and Conservation, Antwerp Zoo Society, 2018 Antwerp, Belgium.
Victor P M G RuttenSection Immunology, Division Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, The Netherlands.ORCID 0000-0002-6171-1805
Cornelis A M de HaanSection Virology, Division Infectious Diseases and Immunology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, The Netherlands.ORCID 0000-0002-4459-9874
Utrecht University · NLCentre National de la Recherche Scientifique · FRÉcole Nationale Vétérinaire d'Alfort · FRErasmus University Rotterdam · NLRotterdam Eye Hospital · NLRoyal Zoological Society of Antwerp · BEZoological Society of London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Elephant endotheliotropic herpesviruses (EEHVs) may cause acute, often lethal, hemorrhagic disease (EEHV-HD) in young elephants. Prevalence of EEHV in different elephant populations is still largely unknown. In order to improve diagnostic tools for the detection of EEHV infections and to obtain insight into its spread among elephants, we developed novel ELISAs based on EEHV1A gB and gH/gL. Performance of the ELISAs was assessed using sera from 41 European zoo elephants and 69 semi-captive elephants from Laos, one of the Asian elephant range countries. Sera from all (sub)adult animals tested (≥5 years of age) showed high reactivity with both gB and gH/gL, indicating that EEHV prevalence has been highly underestimated so far. Reactivity towards the antigens was generally lower for sera of juvenile animals (1 > 5 years). Only one (juvenile) animal, which was sampled directly after succumbing to EEHV-HD, was found to be seronegative for EEHV. The two other EEHV-HD cases tested showed low antibody levels, suggesting that all three cases died upon a primary EEHV infection. In conclusion, our study suggests that essentially all (semi-)captive (sub)adult elephants in European zoos and in Laos carry EEHV, and that young elephants with low antibody levels are at risk of dying from EEHV-HD.

Indexed as

Herpesviridae InfectionsAnimal DiseasesAnimalsAnimals, ZooAntibodies, ViralAsiaCell LineElephantsEnzyme-Linked Immunosorbent AssayEuropeHEK293 CellsHerpesviridaeHumansSeroepidemiologic StudiesViral Envelope ProteinsAntibodies, ViralViral Envelope ProteinsEEHVelephantgBgH/gLherpesvirusesimmunoserology

Identifiers

PMID33670367
PMCPMC7917619
OpenAlexW3129083936

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.