Comparison of oral and anal inoculation of Enteromyxum leei into olive flounder Paralichthys olivaceus

Shin, Sook; Jin, Chang Nam; Sohn, Hanchang; Lee, Jehee

doi:10.1016/j.aquaculture.2022.738641

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…The exact reason for the difference in pathogenicity depending on fish species has not been clarified; however, the difference in the development of E. leei depends on fish species or the genetic resistance of fish species (and strain) against myxosporean infection have been reported (Baerwald et al, 2011;Bartholomew, 1998;Sitjà-Bobadilla et al, 2007;Yanagida, 2017;Yanagida et al, 2004;Yasuda et al, 2005). 2) Co-infection with pathogenic bacteria and E. leei: some pathogenic bacterial infections (Genera Edwardsiella, Vibrio, and Streptococcus) from emaciated olive flounders have been reported (Choi et al, 2012;Kim et al, 2015;Yasuda et al, 2005), and the co-infection with Edwardsiella piscicida affected the pathogenicity of E. leei (Shin et al, 2022). No bacteria were isolated from the kidney and liver of starry flounder; however, previous studies have reported pathogenic bacteria (Photobacterium damselae subsp.…”

Section: Table 2 Regression Analysis Summary For Intensity Of Enterom...mentioning

confidence: 99%

“…The intensity of E. leei infection had a significant relationship with the CF of starry flounder, and the group with high infection intensity (Cq value: less than 23) of parasites had a significantly low CF compared to the group with low or negative (Cq value: more than 27). However, the difference in CF by the infection intensity of E. leei was a mean of more than 20%-30% in olive flounder (Shin et al, 2019, Shin et al, 2022Sohn et al, 2021), whereas the mean was 16.6% in starry flounder.…”

Section: Table 2 Regression Analysis Summary For Intensity Of Enterom...mentioning

confidence: 99%

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Infection of Enteromyxum leei in cultured starry flounder Platichthys stellatus

Shin¹,

Lee²

2023

Fish Aquat Sci

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Enteromyxum leei has been identified as the causative agent of emaciation disease in a wide range of marine fish hosts. In this study, we aimed to determine the effect of the parasitic infection of Enteromyxum species on starry flounder that were cultured in aquaculture farms of Jeju island in Korea. As the mortality of cultured olive flounder Paralichthys olivaceus because of E. leei infection increased, some fish farms on Jeju island attempted to culture the starry flounder Platichthys stellatus, as an alternative. Myxosporeans with a developmental stage similar to E. leei were found in the intestines of cultured starry flounders. The partial 18S rDNA of myxosporeans showed 100% similarity with E. leei. To reveal the effect of E. leei infection on starry flounder, the intensity of E. leei infection measured using quantitative polymerase chain reaction, and the condition factor (CF) of fish were measured and analyzed statistically. The results showed that high-intensity E. leei infection significantly decreased the CF of the starry flounder. However, the pathogenicity of E. leei to starry flounder is low, considering its mortality and clinical signs.

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Section: Table 2 Regression Analysis Summary For Intensity Of Enterom...mentioning

confidence: 99%

Section: Table 2 Regression Analysis Summary For Intensity Of Enterom...mentioning

confidence: 99%

Infection of Enteromyxum leei in cultured starry flounder Platichthys stellatus

Shin¹,

Lee²

2023

Fish Aquat Sci

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Phylogenetic analysis of Ellipsomyxa species (Myxosporea) and description of Ellipsomyxa gordeyi n. sp. from the gall bladder of mullets (Mugiliformes: Mugilidae) in Nha Trang Bay of the East Sea, Vietnam

Yurakhno,

Ha,

Whipps

2024

Parasitology International

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The Emaciation Disease: The Possibility of Non-Pathogenic Occurrence in Olive Flounder (Paralichthys olivaceus)

Kang,

Woo,

Kang

et al. 2024

Animals

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Emaciation disease has directly affected the production of olive flounder—a major aquaculture species in Korea—since the 2000s. Various myxosporeans have been reported as its causative agents. In this study, we investigated the recent resurgence of emaciation on Jeju Island, considering not only myxosporean infections but also potential environmental factors. Unlike previous studies that have primarily attributed the causes of emaciation disease to infections by myxosporeans, this research aimed to determine whether pathogen infection is indeed the sole cause of emaciation disease through molecular and histopathological analyses. Molecular biological and histopathological analyses of aquaculture and laboratory samples revealed that gross pathology lesions of emaciation can occur in the absence of pathogens, as well as in environments with myxosporean infections. These findings suggest that emaciation disease can be exacerbated by certain environmental factors in addition to myxosporeans. Future research should focus on detailed experimental designs to identify the specific environmental conditions contributing to the severity of this disease.

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Comparison of oral and anal inoculation of Enteromyxum leei into olive flounder Paralichthys olivaceus

Cited by 3 publications

References 21 publications

Infection of Enteromyxum leei in cultured starry flounder Platichthys stellatus

Infection of Enteromyxum leei in cultured starry flounder Platichthys stellatus

Phylogenetic analysis of Ellipsomyxa species (Myxosporea) and description of Ellipsomyxa gordeyi n. sp. from the gall bladder of mullets (Mugiliformes: Mugilidae) in Nha Trang Bay of the East Sea, Vietnam

The Emaciation Disease: The Possibility of Non-Pathogenic Occurrence in Olive Flounder (Paralichthys olivaceus)

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