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Related Experiment Videos

Equine rhinitis B virus: a new serotype.

Jin-An Huang1, Nino Ficorilli1, Carol A Hartley1

  • 1Centre for Equine Virology, School of Veterinary Science, The University of Melbourne, Victoria 3010, Australia1.

The Journal of General Virology
|October 17, 2001
PubMed
Summary

Equine rhinovirus serotype 3 isolate P313/75, now tentatively named equine rhinitis B virus 2 (ERBV2), shows distinct genomic differences from related viruses. This new classification is supported by sequence analysis and suggests ERBV2 infections are common in Australian horses.

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Area of Science:

  • Virology
  • Molecular Biology
  • Equine Health

Background:

  • Equine rhinitis viruses (ERVs) are significant pathogens in horse populations.
  • Previous classification of equine rhinovirus serotype 3 (ERBV3) isolate P313/75 was unassigned within the family Picornaviridae.
  • Understanding the genetic makeup and relationships of ERVs is crucial for disease control.

Purpose of the Study:

  • To determine the complete nucleotide sequence of equine rhinovirus serotype 3 isolate P313/75.
  • To analyze the genetic relationship of P313/75 to other equine rhinitis viruses.
  • To propose a new classification for P313/75 based on sequence and phylogenetic analysis.

Main Methods:

  • Whole genome sequencing of equine rhinovirus serotype 3 isolate P313/75.

Related Experiment Videos

  • Bioinformatic analysis including sequence comparison and phylogenetic analysis.
  • Comparison of deduced amino acid sequences, particularly in the P1, P2, and P3 regions.

    • Main Results:

    • The complete genome sequence of P313/75 is 8821 bases, containing a polyprotein open reading frame of 2583 amino acids.
    • P313/75 is most closely related to equine rhinitis B virus (ERBV) strain P1436/71 (formerly ERV type 2).
    • Significant differences were observed in the P1 region, explaining serological distinctions, while P2 and P3 regions showed high similarity.

    Conclusions:

    • Equine rhinovirus serotype 3 isolate P313/75 should be classified as a new serotype within the genus Erbovirus, tentatively named equine rhinitis B virus 2 (ERBV2).
    • The genetic divergence in the P1 region supports its classification as a distinct serotype.
    • Seroepidemiological data suggests ERBV2 infection is prevalent in Australian horses, with a 24% infection rate.