J Vet Sci.  2004 Dec;5(4):387-390.

Experimental evaluation of pathogenicity of Lactococcus garvieae in black rockfish (Sebastes schlegeli)

• Kang SH
• Shin GW
• Shin YS
• Palaksha K
• Kim YR
• Yang HH
• Lee EY
• Lee EG
• Huh NE
• Ju OM
• Jung TS

Abstract

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 i.e. 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.

Keyword

Lactococcus garvieae; Black rockfish (Sebastes schlegeli); mariculture

MeSH Terms

Agglutination Tests/veterinary
Animals
Bacterial Capsules
DNA, Bacterial/genetics/isolation&purification
Fish Diseases/*microbiology/mortality
Fishes
Fluorescent Antibody Technique, Indirect/veterinary
Gram-Positive Bacterial Infections/microbiology/mortality/*veterinary
Lactococcus/*pathogenicity
Polymerase Chain Reaction/veterinary