First report of Flavobacterium plurextorum infection in rainbow trout (Oncorhynchus mykiss) in Korea
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초록
Flavobacterium species are a widespread group of bacteria commonly isolated from various aquatic environments. Among these, several species have been identified as significant pathogens in aqua- culture, causing substantial economic losses. Flavobacterium plurextorum is one such pathogen, pre- viously reported to infect rainbow trout (Oncorhynchus mykiss) and chum salmon (Oncorhynchus keta) eggs. To date, no reports exist of F. plurextorum infection in salmonids within Korea. In January 2024, an outbreak of acute mortality (50–60% within seven days) was observed among acclimated rainbow trout obtained from a local farm in Korea. Affected fish exhibited prominent external lesions, including ulceration and hemorrhaging around the caudal peduncle and fin, with severe cases leading to vertebral column exposure and tail detachment. Yellow-pigmented, smooth colonies were isolated from external lesions, internal organs, and ascites. The isolate was identified as F. plurextorum via 16S rRNA gene sequencing with 100% identity to known strains. This study provides the first evidence of F. plurextorum causing severe muscular damage and high mortality in rainbow trout in Korea.
Abstract
Flavobacterium species are a widespread group of bacteria commonly isolated from various aquatic environments. Among these, several species have been identified as significant pathogens in aqua- culture, causing substantial economic losses. Flavobacterium plurextorum is one such pathogen, pre- viously reported to infect rainbow trout (Oncorhynchus mykiss) and chum salmon (Oncorhynchus keta) eggs. To date, no reports exist of F. plurextorum infection in salmonids within Korea. In January 2024, an outbreak of acute mortality (50–60% within seven days) was observed among acclimated rainbow trout obtained from a local farm in Korea. Affected fish exhibited prominent external lesions, including ulceration and hemorrhaging around the caudal peduncle and fin, with severe cases leading to vertebral column exposure and tail detachment. Yellow-pigmented, smooth colonies were isolated from external lesions, internal organs, and ascites. The isolate was identified as F. plurextorum via 16S rRNA gene sequencing with 100% identity to known strains. This study provides the first evidence of F. plurextorum causing severe muscular damage and high mortality in rainbow trout in Korea.
참고문헌 (18)
- Anderson, R. L., "Cytophaga succinicans sp. n., a factaltatively anaerobic, aquatic myxobacterium", J Bacteriol, 81, pp.130~138 (1961)[DOI]
- Bernardet, J. F., "Cutting a Gordian knot: emended classification and description of the genus Flavobacterium, emended description of the family Flavobacteriaceae, and proposal of Flavobacterium hydatis nom. nov.(basonym, Cytophaga aquatilis Strohl and Tait 1978)", Int J Syst Evol Microbiol, 46, pp.128~148 (1996)[DOI]
- Bernardet, J. F., "Proposed minimal standards for describing new taxa of the family Flavobacteriaceae and emended description of the family", Int J Syst Evol Microbiol, 52, pp.1049~1070 (2002)[DOI]
- Cousin, S., "Flavobacterium aquidurense sp. nov. and Flavobacterium hercynium sp. nov., from a hard-water creek", Int J Syst Evol Microbiol, 57, pp.243~249 (2007)[DOI]
- Kämpfer, P., "Flavobacterium chilense sp. nov. and Flavobacterium araucananum sp. nov., isolated from farmed salmonid fish", Int J Syst Evol Microbiol, 62, pp.1402~1408 (2012)[DOI]
- Kim, J. H., "Flavobacterium chungangense sp. nov., isolated from a freshwater lake", Int Syst Evol Microbiol, 59, pp.007955~007950 (2009)[DOI]
- Kumru, S., "Genomic diversity in flavobacterial pathogens of aquatic origin", Microb Pathog, 142, pp.104053~ (2020)[DOI]
- Lane, D. J., "Nucleic acid techniques in bacterial systematics", pp.115~175 (1991), Wiley
- Lee, J., "Complete genome sequence and potential pathogenic assessment of Flavobacterium plurextorum RSG-18 isolated from the gut of Schlegel's black rockfish, Sebastes schlegelii", Environ Microbiol Rep, 16, pp.e13226~ (2024)[DOI]
- Loch, T. P., "Deciphering the biodiversity of fish-pathogenic Flavobacterium spp. recovered from the Great Lakes basin", Dis Aquat Organ, 112, pp.45~57 (2014)[DOI]
- Loch, T. P., "Flavobacterium spartansii sp. nov., a pathogen of fishes, and emended descriptions of Flavobacterium aquidurense and Flavobacterium araucananum", Int J Syst Evol Microbiol, 64, pp.406~412 (2014)[DOI]
- Loch, T. P., "Emerging flavobacterial infections in fish: A review", J Adv Res, 6, pp.283~300 (2015)[DOI]
- McBride, M. J, "The family flavobacteriaceae", The prokaryotes, 4, pp.643~676 (2014)
- Sakaguchi, S. O., "Infection of oomycetes and bacteria associated with their specific colocalization in chum salmon eggs", Aquaculture, 546, pp.737244~ (2022)[DOI]
- Wahli, T., "Flavobacteria, a never ending threat for fish: a review", Curr Clin Microbiol Rep, 5, pp.26~37 (2018)[DOI]
- Zamora, L., "Flavobacterium oncorhynchi sp. nov., a new species isolated from rainbow trout (Oncorhynchus mykiss)", Syst Appl Microbiol, 35, pp.86~91 (2012)[DOI]
- Zamora, L., "Flavobacterium plurextorum sp. nov. Isolated from Farmed Rainbow Trout (Oncorhynchus mykiss)", PloS one, 8, pp.e67741~ (2013)[DOI]
- Zamora, L., "Flavobacterium tructae sp. nov. and Flavobacterium piscis sp. nov., isolated from farmed rainbow trout (Oncorhynchus mykiss)", Int J Syst Evol Microbiol, 64, pp.392~399 (2014)[DOI]