Journal of Veterinary Science

  • 제21권6호
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  • Pages.86.1-86.8
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  • 2020
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  • 1229-845X(pISSN)
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  • 1976-555X(eISSN)
대한수의학회 (The Korean Society of Veterinary Science)
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Dicyema sphyrocephalum (Phylum Dicyemida: Dicyemidae) isolated from Korean common octopus Callistoctopus minor in Korea

  • Whang, Ilson (Department of Genetic Resources Research, National Marine Biodiversity Institute of Korea (MABIK)) ;
  • Lee, Beomseok (Department of Aqualife Medicine, Chonnam National University) ;
  • Krishnan, Rahul (Department of Aqualife Medicine, Chonnam National University) ;
  • Nakajima, Hiroaki (Department of Biology, Graduate School of Science, Osaka University) ;
  • Furuya, Hidetaka (Department of Biology, Graduate School of Science, Osaka University) ;
  • Shin, Sang Phil (Department of Marine Life Science & Marine Science Institute, Jeju National University)
  • 투고 : 2019.08.02
  • 심사 : 2020.10.08
  • 발행 : 2020.11.30
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초록

Background: Dicyemids are parasites found in the renal sac of cephalopods. The first species of dicyemid was found from kidneys of the Korean common octopus Callistoctopus minor. Objectives: This study aimed to identify the dicyemid and investigate the effect on renal sac of host. Methods: In this study, we compared the morphological characteristics of isolate to dicyemids (Dicyema sphyrocephalum, Dicyema clavatum, and Dicyema dolichocephalum) reported from C. minor in Japan. We compared the 18S ribosomal RNA (rDNA) and cytochrome c oxidase subunit I (COI) sequences of isolate to the sequences of D. shyrocephalum and D. clavatum. The infected octopuses renal tissues were histologically compared with the tissues of uninfected individuals. Results: The morphological characteristic of this isolated species corresponds to D. sphyrocephalum. The sequences similarities of 18S rDNA and COI gene of isolate are 99.7% and 98.1% with D. sphyrocephalum. We observed morphological changes in the epithelia folds of kidney at the dicyemids attached areas. Conclusions: The present study identified the isolate as D. sphyrocephalum and this is the first report of dicyemid species from Republic of Korea. Further studies on the effects of dicyemids on growth and health status of cephalopods will be needed.

키워드

과제정보

We wish to express our gratitude to Kazutaka Suzuki, Ayako, Fukui, and Hiromi Okuda for their assistance in the nucleotide sequence determination.

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