Genetic characterization of a betanodavirus isolated from a clinical disease outbreak in farm-raised tilapia Oreochromis niloticus (L.) in Thailand

J Fish Dis. 2015 Jan;38(1):49-54. doi: 10.1111/jfd.12200. Epub 2013 Oct 28.

Abstract

Betanodavirus infection was diagnosed in larvae of farm-raised tilapia Oreochromis niloticus (L.), in central Thailand. Extensive vacuolar degeneration and neuronal necrosis were observed in histological sections with positive immunohistochemical staining for betanodavirus. Molecular phylogenetic analysis was performed based on the nucleotide sequences (1333 bases) of the capsid protein gene. The virus strain was highly homologous (93.07-93.88%) and closely related to red-spotted grouper nervous necrosis virus (RGNNV).

Keywords: Genetic characteristic; Thailand; betanodavirus; farm-raised tilapia.

MeSH terms

  • Animals
  • Base Sequence
  • Capsid Proteins / genetics
  • Cichlids / virology
  • Fish Diseases / pathology
  • Fish Diseases / virology*
  • Molecular Sequence Data
  • Nodaviridae / classification*
  • Nodaviridae / genetics*
  • Nodaviridae / isolation & purification
  • Phylogeny
  • RNA Virus Infections / pathology
  • RNA Virus Infections / veterinary*
  • RNA Virus Infections / virology
  • Sequence Homology, Nucleic Acid
  • Thailand

Substances

  • Capsid Proteins

Associated data

  • GENBANK/JX402858