Cited by 75Herpesvirus Infections and TreatmentsAnimal Virus Infections StudiesOcular Infections and Treatments

Experimental infection with equine herpesvirus type 1 (EHV-1) induces chorioretinal lesions.

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Hussey, Gisela, Goehring, Lutz S, Lunn, David P, Hussey, Stephen B, Huang, Teng, Osterrieder, Nikolaus, Powell, Cynthia, Hand, Jesse +2 more·2013·Veterinary Research

Abstract

Equine herpesvirus myeloencephalitis (EHM) remains one of the most devastating manifestations of equine herpesvirus type 1 (EHV-1) infection but our understanding of its pathogenesis remains rudimentary, partly because of a lack of adequate experimental models. EHV-1 infection of the ocular vasculature may offer an alternative model as EHV-1-induced chorioretinopathy appears to occur in a significant number of horses, and the pathogenesis of EHM and ocular EHV-1 may be similar. To investigate the potential of ocular EHV-1 as a model for EHM, and to determine the frequency of ocular EHV-1, our goal was to study: (1) Dissemination of virus following acute infection, (2) Development and frequency of ocular lesions following infection, and (3) Utility of a GFP-expressing virus for localization of the virus in vivo. Viral antigen could be detected following acute infection in ocular tissues and the central nervous system (experiment 1). Furthermore, EHV-1 infection resulted in multifocal choroidal lesions in 90% (experiment 2) and 50% (experiment 3) of experimentally infected horses, however ocular lesions did not appear in vivo until between 3 weeks and 3 months post-infection. Taken together, the timing of the appearance of lesions and their ophthalmoscopic features suggest that their pathogenesis may involve ischemic injury to the chorioretina following viremic delivery of virus to the eye, mirroring the vascular events that result in EHM. In summary, we show that the frequency of ocular EHV-1 is 50-90% following experimental infection making this model attractive for testing future vaccines or therapeutics in an immunologically relevant age group.

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Authors
Hussey, G., Goehring, L. S., Lunn, D. P., Hussey, S. B., Huang, T., Osterrieder, N., Powell, C., Hand, J., Holz, C., & Slater, J.
Affiliations
  • Michigan State University (US)
  • Colorado State University (US)
  • North Carolina State University (US)
  • Freie Universität Berlin (DE)
  • Royal Veterinary College (GB)
Corresponding author
Hussey, Gisela
Venue
Veterinary Research
Published
2013
Volume
44
Issue
1
Pages
118
ISSN
  • 0928-4249 (ISSN-L)
  • 1297-9716
OpenAlex
W2171324876
Cited by
70
References
33
Citations by year
2026: 1 · 2025: 5 · 2024: 6 · 2023: 7 · 2022: 12 · 2021: 7 · 2020: 6 · 2019: 7 · 2018: 2 · 2017: 6 · 2016: 5 · 2015: 5 · 2014: 1
FWCI
2.67
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Veterinary Research (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by)
  • RVC Research Online (Royal Veterinary College) (submittedVersion, cc-by)
  • Refubium (Universitätsbibliothek der Freien Universität Berlin) (submittedVersion, cc-by)
  • Universitätsbibliothek der FU Berlin Hochschulschriftenstelle u. Dokumentenserver (cc-by)
Funders
Horserace Betting Levy Board
Topics
  • Health Sciences › Medicine › Epidemiology › Herpesvirus Infections and Treatments
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Virus Infections Studies
  • Health Sciences › Medicine › Ophthalmology › Ocular Infections and Treatments
Keywords
equine herpesvirus 1, chorioretinopathy, choroidal lesions, viral dissemination, central nervous system infection, viremia
MeSH terms
Animals, Chorioretinitis, Encephalomyelitis, Herpesvirus 1, Equid, Fluorescein Angiography, Herpesviridae Infections, Horse Diseases, Horses, Neutralization Tests, Nose, Random Allocation, Viremia, Virus Shedding, Green Fluorescent Proteins

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