The geographic distribution of Taura Syndrome Virus (TSV) in the Americas: Determination by histopathology and in situ hybridization using TSV-specific cDNA probes

Kenneth W. Hasson, Donald V. Lightner, Jocelyne Mari, Jean Robert Bonami, Bonnie T. Poulos, Leone L. Mohney, Rita M. Redman, James A. Brock

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

Representative archived Litopenaeus vannamei samples (117 total), originating from 13 different countries and collected between 1992 to 1996, were analyzed by in situ hybridization to verify the presence of Taura Syndrome Virus (TSV) within pathodiagnostic acute phase TS histological lesions. The in situ assay results showed that TSV was present in one or more representative samples analyzed from each country (76 of 117 samples or 65%), thus, confirming the original histological diagnosis of TSV infection. The false negative in situ hybridization results, obtained for 35% of the samples assayed (41 in total), were attributed to over-fixation with Davidson's AFA (acetic acid, formaldehyde, alcohol) solution and consequent acid hydrolysis of TSV genomic RNA within pathodiagnostic TSV lesions. The collective findings of this disease survey assisted in documenting the spread and current distribution of TSV over a 5-year period and definitively established the presence of TSV within TS diseased shrimp originating from Ecuador when and where the disease was first recognized in 1992. These findings further strengthen the existing evidence that TS has a viral, not a toxic, etiology and indicate that either a single TSV strain, or very similar strains of the same virus, are responsible for the TSV panzootic that has been expanding in the Americas since 1992.

Original languageEnglish (US)
Pages (from-to)13-26
Number of pages14
JournalAquaculture
Volume171
Issue number1-2
DOIs
StatePublished - Feb 15 1999

Keywords

  • In situ hybridization
  • Panzootic
  • Penaeid shrimp
  • Picornaviridae
  • Taura syndrome (TS)
  • Taura syndrome virus (TSV)

ASJC Scopus subject areas

  • Aquatic Science

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