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- Title
Whole‐genome analysis of red sea bream iridovirus spread in 2021 in Japan provided epidemiological and viral traits insight.
- Authors
Ishihara, Hikaru; Harakawa, Shogo; Kawakami, Hidemasa; Yoshii, Keisuke; Murase, Naoya; Yamada, Hidetoshi; Fukuda, Yutaka; Nozaki, Reiko; Kawato, Satoshi; Koiwai, Keiichiro; Hirono, Ikuo; Kondo, Hidehiro
- Abstract
Red sea bream iridovirus (RSIV) is the pathogen that causes red sea bream iridoviral disease. It causes a huge loss to the Japanese aquaculture industry. In 2021, outbreaks of red sea bream iridovirus occurred in South Japan. This study analysed nine whole‐genome sequences of RSIV isolated in Oita and Ehime Prefectures in 2021 using a short‐read next‐generation sequencer. Nine isolates had highly uniform sequences, and there was no variant depending on locations or host species. Phylogenetic analyses with other reported megalocytivirus isolates showed that RSIV isolated in 2021 was genetically different from RSIV previously isolated in Oita and Ehime Prefectures in 2017–2019. These results suggest that RSIV isolated in Oita and Ehime Prefectures in 2021 might spread from a common ancestor different from the recent one. Additionally, it was found that RSIV isolated in 2021 had sequence mutations on protein‐coding sequences that may be involved in viral pathogenicity and infectivity.
- Subjects
JAPAN; PAGRUS auratus; AQUACULTURE industry
- Publication
Journal of Fish Diseases, 2022, Vol 45, Issue 10, p1593
- ISSN
0140-7775
- Publication type
Article
- DOI
10.1111/jfd.13690