Cited by 300Herpesvirus Infections and TreatmentsAnimal Virus Infections StudiesVirology and Viral Diseases

Analysis of equid herpesvirus 1 strain variation reveals a point mutation of the DNA polymerase strongly associated with neuropathogenic versus nonneuropathogenic disease outbreaks.

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Nugent, J., Birch-Machin, I., Smith, K. C., Mumford, J. A., Swann, Z., Newton, J. R., Bowden, R. J., Allen, G. P. +1 more·2006·Journal of Virology

Abstract

Equid herpesvirus 1 (EHV-1) can cause a wide spectrum of diseases ranging from inapparent respiratory infection to the induction of abortion and, in extreme cases, neurological disease resulting in paralysis and ultimately death. It has been suggested that distinct strains of EHV-1 that differ in pathogenic capacity circulate in the field. In order to investigate this hypothesis, it was necessary to identify genetic markers that allow subgroups of related strains to be identified. We have determined all of the genetic differences between a neuropathogenic strain (Ab4) and a nonneuropathogenic strain (V592) of EHV-1 and developed PCR/sequencing procedures enabling differentiation of EHV-1 strains circulating in the field. The results indicate the occurrence of several major genetic subgroups of EHV-1 among isolates recovered from outbreaks over the course of 30 years, consistent with the proposal that distinct strains of EHV-1 circulate in the field. Moreover, there is evidence that certain strain groups are geographically restricted, being recovered predominantly from outbreaks occurring in either North America or Europe. Significantly, variation of a single amino acid of the DNA polymerase is strongly associated with neurological versus nonneurological disease outbreaks. Strikingly, this variant amino acid occurs at a highly conserved position for herpesvirus DNA polymerases, suggesting an important functional role.

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Crossref · 10.1128/jvi.80.8.4047-4060.2006

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  • More than 86% of neuropathogenic outbreaks are caused by strains encoding D752 and more than 95% of non-neuropathogenic outbreaks were caused by virus strains encoding DNA pol N752.

    “It was demonstrated that more than 86% of neuropathogenic outbreaks are caused by strains encoding D752 and more than 95% of non-neuropathogenic outbreaks were caused by virus strains encoding DNA pol N752.”

    From The Pathogenesis and Immune Evasive Mechanisms of Equine Herpesvirus Type 1 (2021) · cites this paper as Nugent et al., 2006

    The Results report D752 in 42 of 49 neurological-outbreak isolates (86% when rounded) and N752 in 78 of 82 nonneurological-outbreak isolates (95% when rounded). The claim overstates the first percentage as “more than 86%” and describes the strains as causing the outbreaks, whereas the Discussion calls the finding an association and says a causal link had not been established. (LLM, conf=0.90)

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  • The neurovirulent EHV-1 strain presents a single nucleotide polymorphism in the catalytic subunit of the viral DNA polymerase ORF30, causing a substitution of asparagine by aspartic acid at amino acid position 752.

    “The neurovirulent EHV-1 strain presents a single nucleotide polymorphism (SNP) in the catalytic subunit of the viral DNA polymerase (ORF30), causing a substitution of asparagine (N) by aspartic acid (D) at amino acid position 752 (Nugent et al., 2006).”

    From The Pathogenesis and Immune Evasive Mechanisms of Equine Herpesvirus Type 1 (2021) · cites this paper as Nugent et al., 2006

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Research works printed but not linked: 5

  1. [6]Bass, E. P. 1979. Immunization with a modified live virus equine rhinopneumonitis vaccine and an aluminum hydroxide absorbed equine influenza vaccine. Proc. Am. Assoc. Equine Pract. 24:65-74. [Google Scholar]
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Authors
Nugent, J., Birch-Machin, I., Smith, K. C., Mumford, J. A., Swann, Z., Newton, J. R., Bowden, R. J., Allen, G. P., & Davis-Poynter, N.
Affiliations
  • Animal Health Trust (GB)
  • Animal Health Trust, Kentford, Newmarket, United Kingdom
  • University of Oxford (GB)
  • University of Kentucky (US)
Corresponding author
Davis-Poynter, N.
Venue
Journal of Virology
Published
2006-04-15
Volume
80
Issue
8
Pages
4047-4060
ISSN
  • 0022-538X (ISSN-L)
  • 1098-5514
OpenAlex
W2167022679
Cited by
295
References
60
Citations by year
2026: 2 · 2025: 13 · 2024: 14 · 2023: 9 · 2022: 15 · 2021: 20 · 2020: 14 · 2019: 23 · 2018: 11 · 2017: 20 · 2016: 11 · 2015: 15 · 2014: 14 · 2013: 15 · 2012: 15
FWCI
10.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Virology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
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 › Epidemiology › Virology and Viral Diseases
Keywords
equine herpesvirus 1, neurovirulence, genetic subgroups, strain differentiation, neurological disorders, equine herpesvirus
MeSH terms
Amino Acid Sequence, Animals, Base Sequence, Disease Outbreaks, DNA-Directed DNA Polymerase, Herpesvirus 1, Equid, Horse Diseases, Horses, Molecular Sequence Data, Open Reading Frames, Point Mutation, Polymorphism, Single Nucleotide

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