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Marine birnavirus (MABV) has wide host range in marine organisms. To clarify various infection properties of MABV in different host species, in vitro study was performed by subculture for 10 passages in several fish cell lines. In CHSE-214, RTG-2 and RSBK-2 cells, the virus produced high yield of vi...

Marine birnavirus (MABV) has wide host range in marine organisms. To clarify various infection properties of MABV in different host species, in vitro study was performed by subculture for 10 passages in several fish cell lines. In CHSE-214, RTG-2 and RSBK-2 cells, the virus produced high yield of virus. Typical CPE with high protein expression was observed in these cells. On the contrary, the virus grown in EPC, FHM and BF-2 cells exhibited no CPE appearance although virus protein was detected. In EPC and FHM cells, the virus titer increased in later passages. The plaque size was distinctly bigger in CHSE-214, RTG-2 and RSBK-2 cells than in other cell lines. The nucleotide sequence of VP2/NS junction region on genome segment A exhibited one specific nucleotide change at 195. The different infection properties in several cell types performed in the present work might reflect in vivo MABV infection in various host species occurring in natural conditions.

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