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Macrobrachium rosenbergii Nodavirus
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Product Description
In the giant freshwater prawn (Macrobrachium rosenbergii), white tail disease (WTD) caused by Macrobrachium rosenbergii nodavirus (MrNV) has been found in many countries including, French West Indies, China, Taiwan, India and Thailand. In mid 2007, the index case of WTD in Australia presented in adult broodstock M. rosenbergii from Flinders River in western Queensland. In order to understand the phylogenetic relationship of the Australian isolate of MrNV with other MrNV isolates, the complete sequences of MrNV (RNA1 and RNA2) including protein B2 were determined in this study. Nucleotide sequence analysis showed that the identities of MrNV (RNA1) Australian strain were 94%, 95%, 95% and 97% similar to Malay, the French West Indies, Chinese and Thai strains, respectively. Also, MrNV (RNA2) Australian sequence showed 92% similar nucleotide sequence compared to the French West Indies, Chinese and Thai strains. The phylogenetic analysis demonstrated the Australian isolate of MrNV (RNA1) is closely related to the Thai and the French West Indies isolates, while MrNV (RNA2) is most distant to the other isolates. The phylogenetic tree of different nucleic acids (317 bp) of protein B2 also highlighted the differences between various nodavirus. Protein B2 of the Australian MrNV is different from fish, Penaeus vannamei and insect nodaviruses but it is closely related to black beetle nodavirus. The Australian protein B2 of MrNV is still in the MrNV cluster.
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Macrobrachium rosenbergii Nodavirus
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