Hygiene of fish feed I. Effect of gamma radiation on the pathogenic bacteria of fish

어류양식용 사료의 위생화 I. 어류유래 병원성 세균에 대한 방사선 조사의 효과

  • Kim, Se-ra (College of Veterinary Medicine, Chonnam National University) ;
  • Lee, Jong-hwan (College of Veterinary Medicine, Chonnam National University) ;
  • Jo, Sung-kee (Food Irradiation Team, KAERI) ;
  • Byun, Myung-woo (Food Irradiation Team, KAERI) ;
  • Kim, Sung-ho (College of Veterinary Medicine, Chonnam National University)
  • 김세라 (전남대학교 수의학대학) ;
  • 이종환 (전남대학교 수의학대학) ;
  • 조성기 (한국원자력연구소 방사선식품공학팀) ;
  • 변명우 (한국원자력연구소 방사선식품공학팀) ;
  • 김성호 (전남대학교 수의학대학)
  • Accepted : 2001.04.26
  • Published : 2001.06.25

Abstract

The gamma-radiation sensitivity of three kinds of pathogenic bacteria to fish was investigated. $D_{10}$ values (irradiation dose required to inactivate 90% of the population) of Edwardsiella tarda, Vibrio anguillarum and Streptococcus faecalis were 0.08, 0.10 and 0.44 kGy, respectively. The inactivation factors were 4.50 - 24.30 and 6.75 - 36.45 at radiation doses of 2 and 3 kGy. Raw moist pellets were inoculated with Edwardsiella tarda, Vibrio anguillarum or Streptococcus faecalis. Inoculated feed samples were packaged in air and irradiated at 5 kGy. This dose was effective in controlling the inoculated and general bacteria in fish feed. We consider gamma-radiation to be an effective method to sterilize pathogenic bacteria in fish feed.

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