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Brief Communication

Occurrence and Molecular Identification of Microcotyle sebastis Isolated from Fish Farms of the Korean Rockfish, Sebastes schlegelii
Jun-Young Song, Keun-Yong Kim, Seo-Woo Choi
Korean J Parasitol 2021;59(1):89-95.
Published online February 19, 2021
DOI: https://doi.org/10.3347/kjp.2021.59.1.89
Microcotyle sebastis is a gill monogenean ectoparasite that causes serious problems in the mariculture of the Korean rockfish, Sebastes schlegelii. In this study, we isolated the parasite from fish farms along the coasts of Tongyeong, South Korea in 2016, and characterized its infection, morphology and molecular phylogeny. The prevalence of M. sebastis infection during the study period ranged from 46.7% to 96.7%, and the mean intensity was 2.3 to 31.4 ind./fish, indicating that the fish was constantly exposed to parasitic infections throughout the year. Morphological observations under light and scanning electron microscopes of the M. sebastis isolates in this study showed the typical characteristics of the anterior prohaptor and posterior opisthaptor of monogenean parasites. In phylogenetic trees reconstructed using the nuclear 28S ribosomal RNA gene and the mitochondrial cytochrome c oxidase I gene (cox1), they consistently clustered together with their congeneric species, and showed the closest phylogenetic relationships to M. caudata and M. kasago in the cox1 tree.

Citations

Citations to this article as recorded by  Crossref logo
  • Redescription of Microcotyle elegans (Polyopisthocotyla: Microcotylidae) from Scombrops boops (Perciformes: Scombropidae) off Japanese Waters
    Yusuke Kamio, Masato Nitta
    Species Diversity.2025; 30(2): 111.     CrossRef
  • Microscopic findings of host–parasite interaction between the Korean rockfish, Sebastes schlegelii, and the monogenean ectoparasite, Microcotyle sebastis
    Sang Phil Shin, Seokryel Kim
    Parasites, Hosts and Diseases.2024; 62(4): 490.     CrossRef
  • The genus Microcotyle in Mediterranean scorpaenoids (Teleostei), including the description of Microcotyle merche n. sp. from Helicolenus dactylopterus (Delaroche, 1809)
    M. Víllora-Montero, A. Pérez-del-Olmo, M. Valmaseda-Angulo, J.A. Raga, F.E. Montero
    Journal of Helminthology.2023;[Epub]     CrossRef
  • Correlation of endemicity between monogenean trematode, Microcotyle sebastis, and parasitic copepods in Korean rockfish, Sebastes schlegelii, from a fish farm in Tongyeong-si, Gyeongsangnam-do, Korea
    Won-Sik Woo, Gyoungsik Kang, Kyung-Ho Kim, Ha-Jeong Son, Min-Young Sohn, Chan-Il Park
    Parasites, Hosts and Diseases.2023; 61(3): 332.     CrossRef
  • Assessment of Salinomycin’s Potential to Treat Microcotyle sebastis in Korean Rockfish (Sebastes schlegelii)
    Won-Sik Woo, Sang Hee Shim, Gyoungsik Kang, Kyung-Ho Kim, Ha-Jeong Son, Min-Young Sohn, Seungjin Lee, Jaekyeong Kim, Jung-Soo Seo, Mun-Gyeong Kwon, Do-Hyung Kim, Chan-Il Park
    Animals.2023; 13(20): 3233.     CrossRef
  • Description of a New Species, Microcotyle pacinkar n. sp. (Monogenea: Microcotylidae), Parasitic on Gills of Sebastes taczanowskii (Sebastidae) from off Usujiri, Hokkaido, Northern Japan
    Yusuke Kamio, Masato Nitta
    Species Diversity.2023; 28(2): 263.     CrossRef
  • Kannaphallus leptosomus n. sp. (Monogenea: Heteraxinidae: Cemocotylinae) parasitizing Scyris indica (Carangiformes: Carangidae) from Malaysia
    Masato Nitta, Yusuke Kondo, Susumu Ohtsuka, Ahmad Syazni Kamarudin, Norshida Ismail
    Systematic Parasitology.2022; 99(5): 587.     CrossRef
  • 5,530 View
  • 115 Download
  • 5 Web of Science
  • Crossref

Original Articles

Molecular Phylogenetics of Centrocestus formosanus (Digenea: Heterophyidae) Originated from Freshwater Fish from Chiang Mai Province, Thailand
Chalobol Wongsawad, Pheravut Wongsawad, Kom Sukontason, Worawit Maneepitaksanti, Nattawadee Nantarat
Korean J Parasitol 2017;55(1):31-37.
Published online February 28, 2017
DOI: https://doi.org/10.3347/kjp.2017.55.1.31
This study aimed to investigate the morphology and reconstruct the phylogenetic relationships of Centrocestus formosanus originating from 5 species of freshwater fish, i.e., Esomus metallicus, Puntius brevis, Anabas testudineus, Parambassis siamensis, and Carassius auratus, in Chiang Mai province, Thailand. Sequence-related amplified polymorphism (SRAP) and phylogeny based on internal transcribed spacer 2 (ITS2) and mitochondrial cytochrome c oxidase subunit 1 (CO1) were performed. The results showed similar morphologies of adult C. formosanus from day 5 after infection in chicks. C. formosanus originated from 4 species of freshwater fish had the same number of circumoral spines on the oral sucker, except for those from C. auratus which revealed 34 circumoral spines. The phylogenetic tree obtained from SRAP profile and the combination of ITS2 and CO1 sequence showed similar results that were correlated with the number of circumoral spines in adult worms. Genetic variability of C. formosanus also occurred in different species of freshwater fish hosts. However, more details of adult worm morphologies and more sensitive genetic markers are needed to confirm the species validity of C. formosanus with 34 circumoral spines originating from C. auratus in the future.

Citations

Citations to this article as recorded by  Crossref logo
  • Loop‐Mediated Isothermal Amplification Combined With Lateral‐Flow Dipstick for Detection of Centrocestus formosanus in Ornamental Fish
    Metawee Sabaijai, Thanawan Tejangkura, Thapana Chontananarth
    Journal of Fish Diseases.2025;[Epub]     CrossRef
  • Revision of Cryptogonimus Osborn, 1903 and Caecincola Marshall et Gilbert, 1905 (Digenea: Cryptogonimidae), supplemental description of Cryptogonimus chili Osborn, 1903, and description of a new species of Caecincola infecting basses (Centrarchiformes: Ce
    Triet N. Truong, Stephen S. Curran, Brandon L. Simcox, Alex P. Bybel, Stephen A. Bullard
    Folia Parasitologica.2025;[Epub]     CrossRef
  • Innovative molecular and immunological approaches of heterophyiasis infecting some Egyptian marketed fishes
    Olfat A. Mahdy, Reem M. Ramadan, Mai A. Salem
    BMC Veterinary Research.2024;[Epub]     CrossRef
  • Multiplex PCR development for the simultaneous and rapid detection of two pathogenic flukes, Dactylogyrus spp. and Centrocestus formosanus, in ornamental fishes
    Phonkawin Jaruboonyakorn, Thanawan Tejangkura, Thapana Chontananarth
    Aquaculture.2022; 548: 737660.     CrossRef
  • Efficacy of Acriflavine for controlling parasitic diseases in farmed Nile tilapia with emphasis on fish health, gene expression analysis, oxidative stress, and histopathological alterations
    Mahmoud Abou-Okada, Huda O. AbuBakr, Azza Hassan, Shimaa Abdel-Radi, Samira H. Aljuaydi, Mohamed Abdelsalam, Engy Taha, Nehal A. Younis, Dalia A. Abdel-Moneam
    Aquaculture.2021; 541: 736791.     CrossRef
  • A review of molecular identification tools for the opisthorchioidea
    Maureen Duflot, Thomas Setbon, Graziella Midelet, Thomas Brauge, Mélanie Gay
    Journal of Microbiological Methods.2021; 187: 106258.     CrossRef
  • Streptococcus, Centrocestus formosanus and Myxobolus tilapiae concurrent infections in farmed Nile tilapia (Oreochromis niloticus)
    Alaa Eldin Eissa, Marwa M. Attia, Mamdouh Y. Elgendy, Gehad A. Ismail, Nader M. Sabry, Abdelbary Prince, Mahmoud A. Mahmoud, Ghada O. El-Demerdash, Mohamed Abdelsalam, Hassan I.M. Derwa
    Microbial Pathogenesis.2021; 158: 105084.     CrossRef
  • Molecular classification of rumen fluke eggs in fecal specimens from Suphanburi Province, Thailand, based on cytochrome C oxidase subunit 1
    Sothorn Anucherngchai, Thapana Chontananarth, Thanawan Tejangkura, Chalobol Wongsawad
    Veterinary Parasitology: Regional Studies and Reports.2020; 20: 100382.     CrossRef
  • Infections of Digenetic Trematode Metacercariae in Wrestling Halfbeak, Dermogenys pusilla from Bangkok Metropolitan Region in Thailand
    Laddawan Patarwut, Thapana Chontananarth, Jong-Yil Chai, Watchariya Purivirojkul
    The Korean Journal of Parasitology.2020; 58(1): 27.     CrossRef
  • Diagnosis of Centrocestus formosanus Infection in Zebrafish (Danio rerio) in Italy: A Window to a New Globalization-Derived Invasive Microorganism
    Antonino Pace, Ludovico Dipineto, Serena Aceto, Maria Concetta Censullo, Maria Carmen Valoroso, Lorena Varriale, Laura Rinaldi, Lucia Francesca Menna, Alessandro Fioretti, Luca Borrelli
    Animals.2020; 10(3): 456.     CrossRef
  • The life cycle of a zoonotic parasite reassessed: Experimental infection of Melanoides tuberculata (Mollusca: Thiaridae) with Centrocestus formosanus (Trematoda: Heterophyidae)
    Hudson A. Pinto, Nicole Q. Gonçalves, Danimar López-Hernandez, Eduardo A. Pulido-Murillo, Alan L. Melo, Petr Heneberg
    PLOS ONE.2018; 13(4): e0194161.     CrossRef
  • Prevalence of Centrocestus formosanus Metacercariae in Ornamental Fish from Chiang Mai, Thailand, with Molecular Approach Using ITS2
    Atcharaphan Wanlop, Chalobol Wongsawad, Pongphol Prattapong, Pheravut Wongsawad, Thapana Chontananarth, Jong-Yil Chai
    The Korean Journal of Parasitology.2017; 55(4): 445.     CrossRef
  • 9,863 View
  • 196 Download
  • 14 Web of Science
  • Crossref
Complete Mitochondrial Genome of Haplorchis taichui and Comparative Analysis with Other Trematodes
Dongmin Lee, Seongjun Choe, Hansol Park, Hyeong-Kyu Jeon, Jong-Yil Chai, Woon-Mok Sohn, Tai-Soon Yong, Duk-Young Min, Han-Jong Rim, Keeseon S. Eom
Korean J Parasitol 2013;51(6):719-726.
Published online December 31, 2013
DOI: https://doi.org/10.3347/kjp.2013.51.6.719

Mitochondrial genomes have been extensively studied for phylogenetic purposes and to investigate intra- and interspecific genetic variations. In recent years, numerous groups have undertaken sequencing of platyhelminth mitochondrial genomes. Haplorchis taichui (family Heterophyidae) is a trematode that infects humans and animals mainly in Asia, including the Mekong River basin. We sequenced and determined the organization of the complete mitochondrial genome of H. taichui. The mitochondrial genome is 15,130 bp long, containing 12 protein-coding genes, 2 ribosomal RNAs (rRNAs, a small and a large subunit), and 22 transfer RNAs (tRNAs). Like other trematodes, it does not encode the atp8 gene. All genes are transcribed from the same strand. The ATG initiation codon is used for 9 protein-coding genes, and GTG for the remaining 3 (nad1, nad4, and nad5). The mitochondrial genome of H. taichui has a single long non-coding region between trnE and trnG. H. taichui has evolved as being more closely related to Opisthorchiidae than other trematode groups with maximal support in the phylogenetic analysis. Our results could provide a resource for the comparative mitochondrial genome analysis of trematodes, and may yield genetic markers for molecular epidemiological investigations into intestinal flukes.

Citations

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  • The complete mitochondrial genome of Aspidogaster ijimai (Platyhelminthes: Trematoda: Aspidogastrea): gene content and phylogenetic inference
    D. A. Solodovnik, D. M. Atopkin, A. A. Semenchenko, M. Urabe, S. G. Sokolov
    Invertebrate Zoology.2025; 22(3): 411.     CrossRef
  • Trematode species diversity in the faucet snail, Bithynia tentaculata at the western edge of its native distribution, in Ireland
    A. Faltýnková, K. O’Dwyer, C. Pantoja, D. Jouet, K. Skírnisson, O. Kudlai
    Journal of Helminthology.2024;[Epub]     CrossRef
  • Black spot diseases in seven commercial fish species from the English Channel and the North Sea: infestation levels, identification and population genetics of Cryptocotyle spp.
    Maureen Duflot, Pierre Cresson, Maéva Julien, Léa Chartier, Odile Bourgau, Marialetizia Palomba, Simonetta Mattiucci, Graziella Midelet, Mélanie Gay
    Parasite.2023; 30: 28.     CrossRef
  • A report on the complete mitochondrial genome of the trematode Azygia robusta Odhner, 1911, its new definitive host from the Russian Far East, and unexpected phylogeny of Azygiidae within Digenea, as inferred from mitogenome sequences
    D. M. Atopkin, A. A. Semenchenko, D. A. Solodovnik, Y. I. Ivashko
    Journal of Helminthology.2023;[Epub]     CrossRef
  • Mitophylogenomics of the zoonotic fluke Echinostoma malayanum confirms it as a member of the genus Artyfechinostomum Lane, 1915 and illustrates the complexity of Echinostomatidae systematics
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    Parasitology Research.2022; 121(3): 899.     CrossRef
  • Characterization of complete mitochondrial genome and ribosomal operon forCarassotrema koreanumPark, 1938 (Digenea: Haploporidae) by means of next-generation sequencing data
    Y.I. Ivashko, A.A. Semenchenko, D.A. Solodovnik, D.M. Atopkin
    Journal of Helminthology.2022;[Epub]     CrossRef
  • Characterization of the complete mitochondrial genomes of Diplodiscus japonicus and Diplodiscus mehari (Trematoda: Diplodiscidae): Comparison with the members of the superfamily Paramphistomoidea and phylogenetic implication
    Qi An, Yang-Yuan Qiu, Yan Lou, Yan Jiang, Hong-Yu Qiu, Zhong-Huai Zhang, Ben Li, Ai-Hui Zhang, Wei Wei, Ying-Yu Chen, Jun-Feng Gao, Chun-Ren Wang
    International Journal for Parasitology: Parasites and Wildlife.2022; 19: 9.     CrossRef
  • The complete mitogenome of the Asian lung fluke Paragonimus skrjabini miyazakii and its implications for the family Paragonimidae (Trematoda: Platyhelminthes)
    Thanh Hoa Le, Khue Thi Nguyen, Linh Thi Khanh Pham, Huong Thi Thanh Doan, Takeshi Agatsuma, David Blair
    Parasitology.2022; 149(13): 1709.     CrossRef
  • Gene Duplication and Gain in the Trematode Atriophallophorus winterbourni Contributes to Adaptation to Parasitism
    Natalia Zajac, Stefan Zoller, Katri Seppälä, David Moi, Christophe Dessimoz, Jukka Jokela, Hanna Hartikainen, Natasha Glover, Dennis Lavrov
    Genome Biology and Evolution.2021;[Epub]     CrossRef
  • First next-generation sequencing data for Haploporidae (Digenea: Haploporata): characterization of complete mitochondrial genome and ribosomal operon for Parasaccocoelium mugili Zhukov, 1971
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  • Molecular characterization of the unique Mesostephanus appendiculatus (Trematoda: Cyathocotylidae) by small ribosomal RNA from Egypt
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    Parasitology Research.2017; 116(4): 1129.     CrossRef
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    Jong-Yil Chai, Bong-Kwang Jung
    Food and Waterborne Parasitology.2017; 8-9: 33.     CrossRef
  • Updated molecular phylogenetic data for Opisthorchis spp. (Trematoda: Opisthorchioidea) from ducks in Vietnam
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    Parasites & Vectors.2017;[Epub]     CrossRef
  • Mitochondrial genome of Ogmocotyle sikae and implications for phylogenetic studies of the Notocotylidae trematodes
    Jun Ma, Jun-Jun He, Guo-Hua Liu, David Blair, Li-Zhi Liu, Yi Liu, Xing-Quan Zhu
    Infection, Genetics and Evolution.2016; 37: 208.     CrossRef
  • The complete mitochondrial genome of Metorchis orientalis (Trematoda: Opisthorchiidae): Comparison with other closely related species and phylogenetic implications
    Lu Na, Jun-Feng Gao, Guo-Hua Liu, Xue Fu, Xin Su, Dong-Mei Yue, Yuan Gao, Yan Zhang, Chun-Ren Wang
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  • Complete Mitochondrial Genome of Echinostoma hortense (Digenea: Echinostomatidae)
    Ze-Xuan Liu, Yan Zhang, Yu-Ting Liu, Qiao-Cheng Chang, Xin Su, Xue Fu, Dong-Mei Yue, Yuan Gao, Chun-Ren Wang
    The Korean Journal of Parasitology.2016; 54(2): 173.     CrossRef
  • Characterization of the complete mitochondrial genome sequence of Homalogaster paloniae (Gastrodiscidae, Trematoda) and comparative analyses with selected digeneans
    Xin Yang, Lixia Wang, Hanli Feng, Mingwei Qi, Zongze Zhang, Chong Gao, Chunqun Wang, Min Hu, Rui Fang, Chengye Li
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  • A complete mitochondrial genome from Echinochasmus japonicus supports the elevation of Echinochasminae Odhner, 1910 to family rank (Trematoda: Platyhelminthes)
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    Parasites & Vectors.2015;[Epub]     CrossRef
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  • 11,660 View
  • 100 Download
  • Crossref

Mini Review

Molecular Phylogeny of Acanthamoeba
Hyun Hee Kong
Korean J Parasitol 2009;47(Suppl):S21.
Published online October 26, 2009
DOI: https://doi.org/10.3347/kjp.2009.47.S.S21

After morphological grouping of Acanthamoeba by Pussard and Pons, phylogeny of the genus has been always a big topic to the researchers. Because of the variability of morphological characteristics, unchangeable and stable characters have been investigated for phylogenic criteria. Isoenzyme and mitochondrial DNA RFLP (Mt DNA RFLP) analyses revealed different patterns among strains assigned to a same species. Therefore, these characteristics would be considered as tools for strain discrimination than species identification. The most recently developed and the most promising method is the sequence analysis of 18s ribosomal RNA coding DNA (18s rDNA). The phylogenic tree based on comparison of 18s rDNA sequences distinguished the 3 morphological groups of Acanthamoeba and divided them into 12 unique sequence types (T1-T12 genotypes). Most clinical and environmental isolates belonged to the morphological group II and the genotype T4. In the Republic of Korea, 2 strains of Acanthamoeba, YM-2 and YM-3, were first isolated from the environment in 1974. However, phylogenic identification of Korean Acanthamoeba isolates from human infections or the environment were tried from the late 1990s. By RFLP analysis or total sequence analysis of 18s rDNA revealed that almost all clinical isolates including the one from a suspicious granulomatous amebic encephalitis patient belonged to the genotype T4. A large number of environmental isolates from contact lens storage cases, tapped water, and ocean sediments also belonged to the genotype T4. Almost identical strain characteristics, such as Mt DNA RFLP pattern of environmental isolates, with the clinical isolates could make a simple conclusion that most environmental isolates might be a potential keratopathogen.

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  • Insights Into the Genetic Diversity of Acanthamoeba Keratitis: A Clinical and Molecular Study
    Vinil K. Kavya, Lakshmipathy Dhanurekha, Ramachandran Abirami, Ranganathan Sampathkumar, Agarwal S. Shweta, Appakkudal R. Anand, Sri B. Madhangi
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Original Article

The phylogenic relationships existing among 14 parasitic Platyhelminthes in the Republic of Korea were investigated via the use of the partial 28S ribosomal DNA (rDNA) D1 region and the partial mitochondrial cytochrome c oxidase subunit 1 (mCOI) DNA sequences. The nucleotide sequences were analyzed by length, G + C %, nucleotide differences and gaps in order to determine the analyzed phylogenic relationships. The phylogenic patterns of the 28S rDNA D1 and mCOI regions were closely related within the same class and order as analyzed by the PAUP 4.0 program, with the exception of a few species. These findings indicate that the 28S rDNA gene sequence is more highly conserved than are the mCOI gene sequences. The 28S rDNA gene may prove useful in studies of the systematics and population genetic structures of parasitic Platyhelminthes.

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