Isolation and characterization of hirame aquareovirus (HAqRV): A new Aquareovirus isolated from diseased hirame Paralichthys olivaceus

Virology. 2021 Apr 10;559:120-130. doi: 10.1016/j.virol.2021.04.002. Online ahead of print.ABSTRACTWe isolated a novel Aquareovirus (hirame aquareovirus: HAqRV) from Japanese flounder Paralichthys olivaceus suffering from reovirus-like infection. In electron microscopy, the spherical virion (75 nm in diameter) was observed with multi-layered capsid structure. The viral genome consisted of 11 segments and regions encoding 7 virion structural proteins and 5 non-structural proteins were predicted. The deduced amino acid sequences of those proteins were highly similar to those of the aquareoviruses. However, the similarity of complete genome sequence between the HAqRV and other aquareoviruses was less than 60%. Phylogenetic analyses based on the deduced amino acid sequences suggested that the HAqRV is not classified into the known species of Aquareovirus. Pathogenicity of HAqRV was clearly demonstrated in accordance with Koch's postulates by experimental infection using Japanese flounder. The results suggest that the HAqRV is a new Aquareovirus species which is highly virulent for the Japanese flounder at early life stages.PMID:33865075 | DOI:10.1016/j.virol.2021.04.002

Source: Virology - April 17, 2021 Category: Virology Authors: Yasuhiko Kawato Tohru Mekata Toyohiro Nishioka Ikunari Kiryu Takamitsu Sakai Maeda Tomoki Satoshi Miwa Kanae Koike Masahiro Sadakane Koh-Ichiro Mori Source Type: research