Vibrio harveyi에서 분리한 extracellular products (ECPs)의 특성과 독성
Characterization and pathogenicity of extracellular products (ECPs) from an isolate of Vibrio harveyi
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Vibrio harveyi, one of the major causal agent of vibriosis, affects a diverse range of marine vertebrates and invertebrates over a wide geographical area. The aims of this study were to investigate the characteristics of extracellular products (ECPs) from an isolate of the pathogenic non‐luminous V. harveyi and the luminous V. harveyi. And ECPs of V. harveyi were examined the pathogenicity to the black rockfish, Sebastes schlegeli, and histopathological traits of internal organs injected by ECPs. Four strains of V. harveyi cultures produced ECPs showing various enzymatic activites (caseinase, gelatinase, phospholipase, lipase, haemolysin). The ECPs showed strong cytotoxicity on macrophages of black rockfish, Sebastes schlegeli and olive flounder, Paralichthys olivaceus. Especially, the virulence of ECPs from the isolate of V. harveyi FR 2 was higher in the intraperitoneally injected black rockfish. Also, the ECPs of V. harveyi FR 2 caused the expansion of sinusoids in the liver, the activation of ellipsoid in the spleen and the sloughing of the epidermal cell in the intestine. It was suggested that the ECPs from V. harveyi play an important role in the pathogenicity process of the V. harveyi.
Abstract
Vibrio harveyi, one of the major causal agent of vibriosis, affects a diverse range of marine vertebrates and invertebrates over a wide geographical area. The aims of this study were to investigate the characteristics of extracellular products (ECPs) from an isolate of the pathogenic non‐luminous V. harveyi and the luminous V. harveyi. And ECPs of V. harveyi were examined the pathogenicity to the black rockfish, Sebastes schlegeli, and histopathological traits of internal organs injected by ECPs. Four strains of V. harveyi cultures produced ECPs showing various enzymatic activites (caseinase, gelatinase, phospholipase, lipase, haemolysin). The ECPs showed strong cytotoxicity on macrophages of black rockfish, Sebastes schlegeli and olive flounder, Paralichthys olivaceus. Especially, the virulence of ECPs from the isolate of V. harveyi FR 2 was higher in the intraperitoneally injected black rockfish. Also, the ECPs of V. harveyi FR 2 caused the expansion of sinusoids in the liver, the activation of ellipsoid in the spleen and the sloughing of the epidermal cell in the intestine. It was suggested that the ECPs from V. harveyi play an important role in the pathogenicity process of the V. harveyi.
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