Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Experimental evaluation of pathogenicity of Lactococcus garvieae in black rockfish (Sebastes schlegeli) | J. Vet. Sci. 2004 5 4 387-390 JOURNAL OF Short Communication Veterinary Science Experimental evaluation of pathogenicity of Lactococcus garvieae in black rockfish Sebastes schlegeli Sung-hyun Kang1 Gee-wook Shin1 Yong-seung Shin1 Palaksha K. Young-rim Kim1 Hyang-hee Yang1 Eun-young Lee1 Eung-goo Lee1 Nam-eung Huh1 Oh Myung Ju2 Tae-sung Jung1 1 Institute of Animal Medicine and College of Veterinary Medicine Gyeongsang National University Jinju 660-701 Korea Department of Fish Pathology Yosu National University Yosu 550-747 Korea Black rockfish Sebastes schlegeli is an important mariculture species in Korea. The production of this fish is drastically declined due to bacterial diseases particularly streptococcosis caused by Lactococcus garvieae. The bacterial surface characteristics of SJ7 and TY6 were found to have capsule but not NB13 and YS18. The experiential evaluation of L. garvieae pathogenicity the capsular isolates showed high cumulative mortality . SJ7 100 and TY6 60 compared to non-capsular isolates. Based on this result the capsular isolates L. garvieae were highly suspected as the causative agent of streptococcosis in rockfish. Key words Lactococcus garvieae Black rockfish Sebastes schlegeli mariculture Aquaculture especially mariculture has become one of the major food producing sectors in Korea 1 14 16 . Among mariculture fishes black rockfish is a very important species in the point of view of consumer s preference and as well as its compatibility with flounder in polyculture. The production of black rockfish was recorded up to 16 548 M T contributing about 45 of the total mariculture fish production in Korea 2002 Statistics Ministry of Maritime Affairs Fisheries Korea . Since a decade the mariculture industry in Korea is facing a serious problem of outbreak of several bacterial diseases particularly streptococcosis. Lactococcus garvieae has been reported as one of the major causative agent of streptococcosis or lactococcosis in fish 2 3 . The .
