한국어병학회지 (Journal of fish pathology)

  • 제35권1호
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  • Pages.113-120
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  • 2022
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  • 1226-0819(pISSN)
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  • 2233-5412(eISSN)
한국어병학회 (The Korean Society of Fish Pathology)
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포르말린과 청색 LED 병용처리에 의한 항스쿠티카 효과

Anti-scuticociliate effects of a combined treatment with formalin and blue LED

  • 강문경 (부경대학교 수산생명의학과) ;
  • 이주엽 (부경대학교 수산생명의학과) ;
  • 이윤항 (부경대학교 수산생명의학과) ;
  • 김도형 (부경대학교 수산생명의학과)
  • Kang, Mun-Gyeong (Department of aquatic life medicine, college of Fisheries Science, Pukyong National University) ;
  • Lee, Ju-Yeop (Department of aquatic life medicine, college of Fisheries Science, Pukyong National University) ;
  • Lee, Yoonhang (Department of aquatic life medicine, college of Fisheries Science, Pukyong National University) ;
  • Kim, Do-Hyung (Department of aquatic life medicine, college of Fisheries Science, Pukyong National University)
  • 투고 : 2022.03.31
  • 심사 : 2022.06.10
  • 발행 : 2022.06.30
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초록

Scuticociliatosis caused by Miamiensis avidus is a very important parasitic disease in olive flounder farming industry. The aim of this study was to determine effect of combined treatment with blue LED (light-emitting diode) illumination and formalin on olive flounder (Paralichthys olivaceus) infected with M. avidus. Different intensity of 405 nm LED (20, 40, and 60 μmol·m-2·s-1) was illuminated on 2.2×104 cells/well of M. avidus in a 24 well microplate for 24 h. Also, 2.4×104 cells/well of M. avidus were exposed to varying combinations of 60 μmol·m-2·s-1 of 405 nm LED and serial 10-fold dilutions of formalin (from 10 to 100 ppm) for 15, 30, 45, and 60 min. Surviving M. avidus were counted using a hemocytometer. For in vivo test, flounder acclimatized at 11-12 practical salinity unit (psu) were challenged with 2×106 cells/ml of M. avidus by immersion method for 1 h. Then, fish were moved and divided into four groups; "F" group, treated with formalin at 50 ppm; "L" group, treated with 60 μmol·m-2·s-1 of 405 nm LED; "C" group, treated with combination of the two methods; and the control group. After treatment for 30 min, fish were transferred to new tanks (salinity = 11-12 psu) and observed for 3 weeks. As a result, illumination of 405 nm LED at 60 μmol·m-2·s-1 killed 100% of M. avidus after 12 h, while 67% and 90% of the scuticociliate died at 20 and 40 μmol·m-2·s-1, respectively, after 24 h exposure. One hundred percent of M. avidus was killed at 90, 80, 80 and 70 ppm after exposure to formalin for 15, 30, 45 and 60 min, respectively. However, combined method (e.g., 60 μmol·m-2·s-1 of 405 nm-LED plus 50 ppm formalin) killed the parasite within 30 min. From in vivo test, similarly, survival rates of fish challenged with M. avidus were 100%, 43%, 29% and 0% in the C, F, L, and control groups, respectively. Results obtained in this study demonstrates that the combined treatment method has clear synergistic effect on scuticociliatosis in fish.

키워드

과제정보

이 논문은 부경대학교 자율창의학술연구비(2022년)에 의하여 연구되었음.

참고문헌

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