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A porcine rotavirus strain with dual VP7 serotype specificity

H S Nagesha1, J Huang, C P Hum

  • 1School of Microbiology, University of Melbourne, Parkville, Victoria, Australia.

Virology
|March 1, 1990
PubMed

Insights

Porcine rotavirus MDR-13 exhibits VP7 gene relationships with G3 and G5 serotypes. Analysis revealed significant nucleotide and amino acid similarity, suggesting evolution through VP7 gene mutations.

Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Porcine rotavirus (PRV) is a significant pathogen in swine.
  • Rotaviruses exhibit genetic diversity and reassortment, impacting epidemiology.
  • The VP7 gene is a key determinant of rotavirus serotype.

Purpose of the Study:

  • To investigate the VP7 gene characteristics of porcine rotavirus strain MDR-13.
  • To determine the antigenic and genetic relationships of MDR-13 with human and other porcine rotaviruses.
  • To explore the evolutionary implications of observed VP7 gene similarities.

Main Methods:

  • Antigenic characterization through neutralization assays.
  • Gene sequencing of the VP7 gene from porcine rotavirus MDR-13 and reassortant strains.
  • Nucleotide and amino acid sequence comparison using bioinformatics tools.

Main Results:

  • Porcine rotavirus MDR-13 demonstrated a two-way antigenic relationship with human rotavirus RV-3.
  • Upon gene reassortment, MDR-13 showed VP7 relationships with both G3 and G5 serotypes.
  • Sequence analysis revealed marked nucleotide and amino acid similarity of the VP7 gene with G3 and G5 serotype viruses.

Conclusions:

  • The VP7 gene of porcine rotavirus MDR-13 shares significant similarities with G3 and G5 serotypes.
  • Evolution of such strains may occur through sequential mutations within the VP7 gene.
  • Understanding these genetic relationships is crucial for rotavirus surveillance and control strategies.

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