Identification and Description of The Virus
Taura syndrome virus was first classified as a possible member of the family Picornaviridae based on biological and physical characteristics. It was later reclassified in the Dicistroviridae family, genus Cripavirus. It has since been reassigned to a second genus in the same family - the Aparavirus.
TSV is a 32 nm nonenveloped particle with an icosahedral morphology and a buoyant density of 1.338g/ml. The genome is single-stranded positive-sense and has 10,205 nucleotides (excluding the 3' poly-A tail). The capsid consists of three major proteins: CP1 (40 kDa), CP2 (55 kDa) and CP3 (24 kDa) alongside a minor protein of 58 kDa.
Audelo-del-Valle in 2003 reported certain primate cell lines could be used to culture TSV. Later studies demonstrated their report was based on misinterpreted data. TSV does not appear to be a potential zoonosis. All virus amplifications require the use of live shrimp, as there is no continuous cell line that supports the growth of shrimp viruses.
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