Histopathogenic Characteristics of Haemorrhagic Ulcer in Cultivated Snakehead Channa argus Artificially Infected with Aeromonas veronii

Aeromonas veronii 인공감염에 의한 양식 가물치 궤양증의 병리조직학적 특성

  • 이훈구 (부산수산대학교 미생물학과) ;
  • 이택열 (부산수산대학교 해양생물학과) ;
  • 김봉석 (부산수산대학교 해양생물학과)
  • Published : 1993.04.01

Abstract

Aeromonas veronii was isolated from the haemorrhagic ulcer of the snakehead that had been infected in natural condition, This bacterium was injected hypodermically into the healthy snakeheads and the effect was compared to the naturally infected fish. Both groups showed severe necrosis, falling off of epidermal tissue and hypodermal muscle. In both groups, severe histophathological changes were observed in gill, digestive tract and kidney just before death. Artificially injected fish showed necrosis of tissue in skin, gill and digestive tract from 2 days after injection. Then it showed necrosis or cell atrophy of tissue in kidney from 5 days after injection, and in liver and spleen just before death. Snakehead infected with haemorrhagic ulcer died within 9 days after infection, showing the symptom of skin damage and metabolic inhibition in respiration" digestion, excretion, etc. It was concluded that Aeromonas veronii (CA26) that was isolated from the naturally infected fish is the main bacterium causing haemorragic ulcer in the snakehead.

Keywords

snakehead(Channa argus);histopathology;Aeromonas veronii;haemorrhagic ulcer