Studies on Mtxosporidian parasites from Korean fishes

한국산 어류에 기생하는 포자충에 관한 연구

  • Published : 2002.12.01

Abstract

Thirty five catfish (Silurus asotus) cultured in a fish farm of Jungeup and 222 wild goby (Acanthoguobius flavimanus) caught from the estuary of Mankyoung River, Chonbuk province of Korea were examined the prevalence of myxosporidian infestation. A lot of white spherical myxosporidian cysts in the intestinal epithelium of catfish and the muscle of goby were easily found. The cysts in size were 56 × 73 (42-77 × 59-93 ㎜) in catfish and 2.43 × 0.95 ㎜ in goby. The infection rate (%) were 88.4 in catfish and 89.4 in goby. The Myxosporidians from the intestine of catfish and from the musculature of goby were identified as Myxoborus miyairii and Henneguya tridentigeri on the basis of the shape and structure of the spores under a light microscope. imensions (㎜) of fresh spores of Myxoborus miyairii: length, 11.0-12.0; width, 5.0-6.0; thickness, 3.5-4.0; polar capsule: length, 5.0-5.5; thickness, 1.5-2.0; polar filament: length, 40-45. Dimensions ($\mu{m}$) of fresh spore of Henneguya. tridentigeri: length, 10.0-12.0; width 6.0-8.0; thickness, 4.8; polar capsule: length, 4.6; thickness, 2.6; iodinophilic vacuole: 2.8 × 2.4. No significant pathological change was found from the infected fish. This is the first report on M. miyairii and H. tridentigeri from fish species in Korea.

한국산 어류에 감염된 포자충의 종류와 병해를 조사 할 목적으로 2001년 9월부터 2002년 8월까지 양식중인 정읍산 메기와 만경강 하구의 기수 구역에 서식하는 자연산 문절망둑을 조사하였다. 이 들 어류에서 지금까지 한국 미기록종인 포자충의 감염이 확인되었다. 즉 메기의 장 상피조직에서 Myxobolus miyairii Kudo, 1919가, 문절망둑의 피하 근육조직에서 Henneguya tridentigeri Ozaki & Ishizaki, 1941가 검출되었다. 메기에 기생 된 M. miyairii는 장 상피조직에 42-77 (56) $\mu{m}$ × 59-93(73) $\mu{m}$크기의 백색 영양체가 무수히 관찰되었고, 포자의 길이는 11.0-12.0(11.3) $\mu{m}$이었다. 어체 기생율은 86.7-90%이었으나, 감염어는 별다른 병변을 발견할 수 없었다.

Keywords

References

  1. Awakura, T. and K. Takahisa: On the milky condition in smoked Coho salmon (Oncorhynchus kisutch) caused by Myxosporidian parasite. Fish Pathol., 12(3): 179-184, 1977 https://doi.org/10.3147/jsfp.12.179
  2. Chen C. and M. Chenglun: Fauna Sinica, Myxozoa, Myxosporea. Science Press. Beijing China, pp 1-993, 1998
  3. Egusa S.: Myxobolus buri sp. n. (Myxosporea: Bivalvulida) parasitic in the brain of Seriola quinqueradiata Temminck et Schlegel. Fish Pathol., 19(4): 239-244, 1985 https://doi.org/10.3147/jsfp.19.239
  4. Egusa S., Y. Maeno and M. Sorimachi: A new species of Myxozoa, Myxobolus episquamalis sp. nov. infecting the scales of the mullet, Mugil cephalus L. Fish Pathol., 25(2): 87-91, 1990 https://doi.org/10.3147/jsfp.25.87
  5. Eiras J. C.: Synopsis of the species of the genus Henneguya Thelohan, 1892 (Myxozoa:Myxosporea: Myxobolidae). Sys. Parasitol., 52: 43-54, 2002 https://doi.org/10.1023/A:1015016312195
  6. Hoshina T.: Notes on some Myxosporidian parasites on fishes of Japan. J. Tokyo Univ. Fish., 39(1): 69-89, 1952
  7. Kudo, R. R.: Guide to the study of parasitic protozoan. Illin. Biol., Monogra., 5: 130-132, 1919
  8. Minchew C. D. and B. H. Sleight: Henneguya episclera sp. n. (Protozoa: Myxosporida). A new Myxosporidian from the eye of the pumpkinseed sunfish. J. Parasitol., 63(4): 667-668, 1977 https://doi.org/10.2307/3279566
  9. Ozaki Y. and H. Ishizaki: Myxosporidian parasites of Tridentiger obscurus (Temminck et Schlegel). J. Sci. Hiroshima Univ. Ser. B., Div. 19: 181-192, 1941
  10. Sakaguchi, S., T. Hara, T. Matsusata, T. Shibara, Y. Yamguchi, H. Kawai and Y. Maeno: Scoliosis of cultured yellowtail caused by parasitc Myxobolus buri. Bull. Natl, Res. Inst. Aquacult., 12: 79-86, 1987
  11. Theodore R., M. Thomas, K. Sawyer and S. A. MacLean : Henneguya sp. (Cnidospora: Myxosporida) parasitic in the heart of the bluefish, Pomatomus saltatrix. J. Parasitol., 63(5): 890-896, 1977 https://doi.org/10.2307/3279903
  12. Yukio M., M. Sorimachi, K. Ogawa and S. Egusa: Myxobolus spinacurvatura sp. n.(Myxosporea: Bivalvulida) parasitic in deformed mullet, Mugil cephalus. Fish Pathol., 25(1): 37-41, 1990 https://doi.org/10.3147/jsfp.25.37
  13. 江草 周三. 城 泰彦. 岡 英夫. 伊賀 田邦義: ボラ, Mugil cephalus のMyxobolus屬 粘液胞子蟲に 因る皮膚病について. 魚病硏究. 24(1): 59-60, 1989
  14. 佐野 德夫 譯 (Bychowsky B. E.): 魚類 寄生蟲(原生動物 編), 厚生閣. pp 80-109, 1968