Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
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Histopathological reaction of red marbled rockfish, Sebastiscus tertius infected by Aeromonas salmonicida

Aeromonas salmonicida에 감염된 붉은쏨뱅이, Sebastiscus tertius의 조직병리학적 반응

  • Kim, Seok-Ryel (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Jin, Young Guk (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Park, Jung Jun (Aquaculture Research Department, National Institute of Fisheries Sciences)
  • 김석렬 (국립수산과학원 서해수산연구소) ;
  • 진영국 (국립수산과학원 서해수산연구소) ;
  • 박정준 (국립수산과학원 양식관리과)
  • Received : 2019.11.29
  • Accepted : 2019.12.11
  • Published : 2019.12.31
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Abstract

As an epidemiological survey, mortality of marbled rockfish, Sebastiscus tertius observed from a fish farm in Gyeongnam province of South Korea. The major macroscopic sign of the diseased fish was severe multifocal dermal ulceration. Histological observation revealed inflammation, necrosis and colonization of bacteria in various tissues (gill, liver, spleen and kidney). Bacteria was isolated from spleen and kidney in moribund and mortality fish. Seven bacterial isolates from the diseased fish were identified as Aeromonas salmonicida subsp. salmonicida using API 20E and 20NE, API 50CH API ZYM system. Under light microscopy, infected marbled rockfish showed the lifting of the lamella epidermal layer, edematous changes and hypertrophy of epithelial cell in the gill filament. The atrophy of the mucosal fold, erythema in the intestine, and the necrosis of hematopoietic tissue and renal tubule cells with karyolysis were observed in the kidney. In this study was demonstrated the histological reaction of red marbled rockfish infected by Aeromonas salmonicida. Furthermore, this is the first account of extensive dermatitis in Sebastiscus tertius due to atypical A. salmonicida infection, which has high potential in aquaculture among native fish species.

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References

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