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Viruses2025; 17(7); 947; doi: 10.3390/v17070947

Equine Parvovirus-Hepatitis Population Dynamics in a Single Horse over 16 Years.

Abstract: Many viruses mutate rapidly to adapt to host defenses, and for some of these viruses, the result is long-term infection in individual hosts. The work described here examines the infection and long-term maintenance of a newly identified virus, equine parvovirus-hepatitis (EqPV-H), in an individual horse. This description is possible because of a hypervariable region in the capsid gene; sequence variants were tracked by high-throughput sequencing of serum samples taken over a 16-year period. The data support the hypothesis that EqPV-H infection resulted in a sequence variant bottleneck. The continuing infection evolved into a complex viral population showing a pattern of emergence, dominance, and recession with replacement. This is the first temporal description of the capsid gene evolution of EqPV-H in a single animal.
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Publication Date: 2025-07-04 PubMed ID: 40733563PubMed Central: PMC12299937DOI: 10.3390/v17070947Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The article reports on the long-term study of the mutation and persistence of equine parvovirus-hepatitis (EqPV-H) virus in a single horse over a span of 16 years. The research utilized high-throughput sequencing to track the progression of viral genomic variations in the horse’s serum samples and notes a unique pattern of emergence, dominance, and recession in virus population.

Investigation into Equine Parvovirus-Hepatitis Infection

  • The research carries out a detailed study of the infection and long-term survival of the equine parvovirus-hepatitis (EqPV-H) virus within one horse. This evolved due to a hypervariable region in the capsid gene.
  • By analysing this highly mutable region, the researchers were able to monitor how the virus mutated and adapted in the host over the 16 years of the study.
  • The research provides valuable insights into how viruses evolve to thrive within a host despite the host’s inherent immune responses.

High-Throughput Sequencing and Detection of Sequence Variant Bottleneck

  • The research relies on high-throughput sequencing, a method known for its speed and efficiency in analysing vast quantities of DNA sequences, to track the virus variants in the serum samples from the horse.
  • The results indicate a sequence variant bottleneck, which refers to a sharp decrease in the genetic diversity of the virus population.
  • The term ‘bottleneck’ is used to describe the reduction in variability of the virus due to some pressure that resulted in the majority of variants not surviving.
  • Such bottlenecks are useful in understanding how viruses survive and adapt within hosts and can provide insights into developing more effective treatments.

Emergence, Dominance, and Recession in Virus Population

  • An interesting phenomenon observed in the study was the pattern of emergence, dominance, and recession within the viral population. Over the 16-year study period, different variants of the virus emerged, dominated the host environment, then receded, and were replaced by new emerging variants.
  • This pattern shows how the virus population within a host is not static; instead, it changes and adapts over time to better survive in the host environment.
  • Understanding this changing population can help in addressing long-term chronic infections and the development of resistance to antiviral medications.

Cite This Article

APA
Scupham AJ. (2025). Equine Parvovirus-Hepatitis Population Dynamics in a Single Horse over 16 Years. Viruses, 17(7), 947. https://doi.org/10.3390/v17070947

Publication

Viruses
ISSN: 1999-4915
NlmUniqueID: 101509722
Country: Switzerland
Language: English
Volume: 17
Issue: 7
PII: 947

Researcher Affiliations

Scupham, Alexandra J
  • Animal and Plant Health Inspection Service, Center for Veterinary Biologics, Ames, IA 50010, USA.

MeSH Terms

  • Animals
  • Horses
  • Horse Diseases / virology
  • Parvoviridae Infections / veterinary
  • Parvoviridae Infections / virology
  • Parvovirus / genetics
  • Parvovirus / classification
  • Parvovirus / isolation & purification
  • Phylogeny
  • Capsid Proteins / genetics
  • High-Throughput Nucleotide Sequencing
  • Hepatitis, Viral, Animal / virology
  • Genetic Variation
  • Evolution, Molecular

Conflict of Interest Statement

The author declares no conflicts of interest.

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