Journal of fish pathology (한국어병학회지)

The Korean Society of Fish Pathology (한국어병학회)
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Neobenedenia girellae infection of aquarium-raised snubnose pompano (Trachinotus blochii) in Korea

  • Nam, U-Hwa (Department of Marine Bioscience, Gangneung-Wonju National University) ;
  • Seo, Hyun-Joon (Department of Marine Bioscience, Gangneung-Wonju National University) ;
  • Hwang, Ilson (Marine Biodiversity Institute of Korea) ;
  • Kim, Jeong-Ho (Department of Marine Bioscience, Gangneung-Wonju National University)
  • Received : 2020.06.05
  • Accepted : 2020.06.11
  • Published : 2020.06.30
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Abstract

We found skin flukes in snubnose pompano (Trachinotus blochii) from a public aquarium and attempted clear identification of them to the species level by morphology and molecular analyses. Skin flukes were collected from snubnose pompano showing dyspnea, anorexia and mild hemorrhage on the skin. All the fish samples (n=2) were infected with the flukes on the skin, gill and eyes, covered with excessive mucus. The isolated worms were transferred for making slide specimen and PCR amplification targeting 18S rDNA, 28S rDNA, mitochondrial cytochrome c oxidase subunit 1 (mt cox1) and cytochrome b (Cytb) genes for further analyses. Morphology and measurements data of our slide specimen coincided with those of Neobenedenia girellae. The sequence data of 2 genes (28S rDNA and Cytb) and the phylogenetic trees revealed that our specimen consistently belonged to the N. girellae clade. For 18S rDNA and mt cox1 genes, there was no sequence of either of these 2 Neobenedenia species from the type host available in GenBank. This is the first record of N. girellae in snubnose pompano, but it is still unclear if the snubnose pompano is a natural host for N. girellae or not because N. girellae is known to have an unusual broad host range and the host-switching can occur particularly in captive conditions such as aquarium or aquaculture facilities.

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References

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