We study on the infectious diseases of aquatic organisms.

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Oct. 8, 2023 The manuscript “Genomic diversity of wild and cultured Yesso scallop Mizuhopecten yessoensis from Japan and Canada” was published in G3 Genes|Genomes|Genetics. (Sutherland BJG, Itoh N, Gilchrist K, Boyle B, Roth M, Green TJ) Abstract
Sep. 11-14, 2023 Some members had presentations in 21st International Conference on Diseases of Fish and Shellfish (EAFP XXI).
  • Rearing density in a specific period determined Francisella halioticida infection of juvenile Yesso scallops Mizuhopecten yessoensis(Itoh)
  • Target protein expression on Tetrahymena cell-surface using the signal peptide and GPI-anchor sequences of a immobilization antigen of Cryptocaryon irritans(Watanabe)
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  • Effect of light exposure on the circadian pattern in theront excystment of Cryptocaryon irritans (Kotake)
  • Perkinsus olseni requires glycine betaine from the host Manila clam Ruditapes philippinarum for proliferation (Liu)
  • Sep. 10, 2023 The manuscript “Four-year field survey on francisellosis in Yesso scallops Mizuhopecten yessoensis cultured in southern Hokkaido, Japan” was published in Aquaculture. (Kawahara, Yoshinaga, Itoh) Abstract
    Aug. 14, 2023 The manuscript “Effect of Biokos, a natural lipopeptide surfactant extracted from a bacterium of the Pseudomonas genus, on infection of Cryptocaryon irritans” was published in Journal of Fish Diseases. (Watanabe, Hansen J, Kotake, Fujii, Matsuoka, Yoshinaga) Abstract
    Aug. 11, 2023 The manuscript “Identification of glycine betaine as a host-derived molecule required for the vegetative proliferation of the protozoan parasite Perkinsus olseni” was published in Parasitology. (Liu, Yoshinaga, Itoh) Abstract
    Jul. 22, 2023 The manuscript “Target Protein Expression on Tetrahymena thermophila Cell Surface Using the Signal Peptide and GPI Anchor Sequences of the Immobilization Antigen of Cryptocaryon irritans” was published in Molecular Biotechnology. (Watanabe, Asada, Inokuchi, Kotake, Yoshinaga) Abstract
    Jan. 17, 2023 The manuscript “Francisella halioticida Infection of Intermediately Cultured Juvenile Scallops Mizuhopecten yessoensis in Southern Hokkaido.”was published in Fish Pathology. (Furumoto, Yoshinaga, Itoh) Abstract
    Dec. 15, 2022 The manuscript “Molecular and microscopic identification of Eomarteilia granula infection in Manila clam Ruditapes philippinarum off the south coast of Korea” was published in Diseases of Aquatic Organisms. (Kang HS, Lee HM, Itoh N, Cho YG, Choi KS) Abstract
    Jun. 1, 2022 The manuscript “Establishment and characteristics of Perkinsus beihaiensis in vitro isolates from Mediterranean mussels (Mytilus galloprovincialis)”was accepted for publication in Diseases of Aquatic Organisms. (Liu, Maeda, Yoshinaga, Itoh) Abstract
    May. 1, 2022 Dr. Yuho Watanabe arrived at the position of Assistant Professor.
    Feb. 12, 2022 The manuscript “Five new and two known species of Heterobothrium (Monogena:Diclidophoridae) infecting puffers of the genus Takifugu from Japanese waters”was accepted for publication in Journal of Systematic Parasitology. (Ogawa, Itoh) Abstract
    Jan. 4, 2022 The manuscript “First record of Perkinsus olseni in cultured mussels (Mytilus chilensis) in the Beagle Channel, Southwestern Atlantic Ocean”was accepted for publication in Aquaculture. (Vazquez, Itoh, Cremonte) Abstract
    Mar. 6-7, 2022 Some members had presentations in Spring Meeting of JSFP held online.
  • 中間育成期間におけるクロアワビの死亡とAbalone asfa-like virus感染状況調査(Nagase)
  • Establishment and characteristics of Perkinsus beihaiensis isolates from Mediterranean mussels (Mytilus galloprovincialis) (Liu)
  • Dec. 9, 2021 The manuscript “Supplementation with lipids enhances zoosporulation of Perkinsus species”was accepted for publication in Journal of Invertebrate Pathology.(Maeda, Yoshinaga, Itoh)Abstract
    Nov. 21-22, 2021 Maeda had presentations in JSP 2021 held online.
  • An estimated transmission mode of Perkinsus olseni, a protozoan parasite of marine mollusks, from lipid requirements for zoosporulation (Maeda)
  • Oct. 24, 2021 The manuscript “Evaluation of the protective effects of DNA vaccines encoding an infection-related cysteine protease from Cryptocaryon irritans, the pathogenic organism of cryptocaryoniasis”was accepted for publication in Aquaculture.(Watanabe, Takada, Kotake, Itoh, Yoshinaga)Abstract
    Sep. 11-12, 2021 Some members had presentations in Autumn Meeting of JSFP held online.
  • The survey of Francisella halioticida infection in juvenile scallops during intermediate culture (Furumoto)
  • Light expose affects and circadian rhythm in excystment of theront of Cryptocaryon irritans (Kotake)
  • Jul. 5, 2021 The manuscript “Emendation of the genus Neoheterobothrium and a proposal of a new genus Paraheterobothrium (Monogenea: Diclidophoridae) for five species of diclidophorids from Pleuronectiform fishes”was accepted for publication in Journal of Systematic Parasitology.(Ogawa, Itoh, Oliva)Abstract
    Mar. 20-21, 2021 Some members had presentations in Spring Meeting of JSFP held online.
  • Supplementation with lipids enhances zoosporulation of Perkinsus species.(Maeda)
  • A trial of genome sequencing of Marteilioides chungmuensis, the causative agent of the ovary enlargement disease in the Pacific oyster (Kitagawa)
  • Seasonality of francisellosis in Yesso scallops cultured in southern Hokkaido, Japan.(Kawahara)
  • Evaluation of proteases of Cryptocaryon irritans as vaccine antigens(Watanabe)
  • May. 17, 2021 The manuscript “Functional analysis of the proteases overexpressed during the invasive and parasitic stages of Cryptocaryon irritans and their potential as vaccine antigens”was accepted for publication in Aquaculture.(Watanabe, Zenke, Itoh, Yoshinaga)Abstract
    Mar. 11, 2021 The manuscript “Francisellosis of Yesso scallops Mizuhopecten yessoensis in Japan is caused by a novel type of Francisella halioticida”was published in Diseases of Aquatic Organisms,(Kawahara, Yoshitake, Yoshinaga, Itoh)Abstract
    Jan. 29, 2021 Prof. Kay Lwin Tun (University of Yangon, Myanmar), an alumnus of the Fish Disease Laboratory, received the Encouragement Award of the Hitachi Global Foundation Asia Innovation Award 2020 (Award title: Development of Aquatic Bioscience Research and Human Resources in Myanmar)
    Jan. 27, 2021 Professor Tomoyoshi Yoshinaga had an online lecture entitled "Importance of Biosecurity in Bivalves; Toward the Reconstruction of Sustainable Akoya Oyster Aquaculture" in the Fisheries Seminar, Ainan Cho, Ehime Prefecture.
    Dec. 21, 2020 The manuscript “A new myxosporean species, Henneguya lata n. sp. (Myxozoa: Myxobolidae), from the gills of yellowfin seabream Acanthopagrus latus (Perciformes: Sparidae) in the Gulf of Tonkin, Vietnam. ”was accepted for publication in Parasitology Research,(Chinh, Ngo, Tuc, Itoh, Yoshinaga, Shirakashi, Doanh )Abstract
    Oct. 27, 2020 Associate Professor, Naoki Itoh, had a presentation entitled with " What have we learned from field surveys for shellfish diseases?" as a key note speaker in the 6th International Conference on Tropical and Coastal Region Eco Development 2020 held in Semarang, Indonesia.
    Oct. 5, 2020 The manuscript “Anisakis spp. in toothed and baleen whales from Japanese waters with notes on their potential role as biological tags”was accepted for publication in Journal of Parasitology International,(Gomes, Quiazon, Kotake, Fujise, Ohizumi, Itoh, Yoshinaga)Abstract
    Sep. 14, 2020 Professor Tomoyoshi Yoshinaga had an online lecture entitled "Importance and Current Status of Biosecurity in Fishery Animals" in Workshop in the Model Project for Improving the Biosecurity System for Fishery Animals, Ehime Prefecture.
    Sep. 6, 2020 The manuscript “A novel dimorphic microsporidian Ameson iseebi sp. nov. infecting muscle of the Japanese spiny lobster, Panulirus japonicus, in western Japan”was accepted for publication in Journal of Invertebrate Pathology,(Itoh, Kuboyama, Freeman, Katata, Yamakawa, Yoshinaga)Abstract
    Aug. 28, 2020 The manuscript “Heavy metacercarial infection in the abdominal cavity of hatchery-reared Japanese dace Tribolodon hakonensis”was accepted for publication in Fish Pathol,(Komatsu, Itoh, Ogawa)Abstract
    Jul. 27, 2020 The manuscript “Development of a simple host-free medium for efficient prezoosporulation of Perkinsus olseni trophozoites cultured in vitro”was accepted for publication in Parasitology International,(Maeda, Yoshinaga, Itoh)Abstract
    Jul. 15, 2020 The manuscript “Stable and quantitative small-scale laboratory propagation of Cryptocaryon irritans”was accepted for publication in MethodsX,(Watanabe, How, Zenke, Itoh, Yoshinaga)Abstract
    Apr. 24, 2020 The manuscript “Control of the daily rhythms by photoperiods in protomont detachment and theront excystment of the parasitic ciliate Cryptocaryon irritans”was accepted for publication in Fish Pathology, (Watanabe, How, Zenke, Itoh, Yoshinaga)Abstract
    Apr. 1, 2020 Dr. Nanae Karakawa arrived at the position of Program-Specific Assistant Professor.
    May. 10, 2020 The manuscript “Anisakis spp. in fishery products from Japanese waters: Updated insights on host prevalence and human infection risk factors”was accepted for publication in Parasitology International, (Gomes, Quiazon, Kotake, Itoh, Yoshinaga). Abstract
    Dec. 20, 2019 The manuscript “The effects of environmental and nutritional conditions on the development of Perkinsus olseni prezoosporangia.”was accepted for publication in Experimental Parasitology, (Umeda, Yang, Waki, Yoshinaga, Itoh). Abstract
    Dec. 19, 2019 The manuscript “Coccidian Parasite in Sea Cucumber (Apostichopus japonicus) Ovaries”was accepted for publication in The Biological Bulletin, (Itoh; collaboration with Japan Fisheries Research and Education Agency)Abstract
    Nov. 7, 2019 Dr. Jose Fernandez-Robledo, Senior Research Scientist in Begelow Laboratory for Ocean Sciences,visted and gave a special lecture "The IKIGAI for the protozoan parasite of oysters Perkinsus marinus (Perkinsozoa)".
    Oct. 3, 2019 Associate Professor Li Yingdong (Shenyang Agriculture University) arrived at the position of Distinguished Visiting Research Scholar.
    Sep. 11-12, 2019 Maeda and Kitagawa had presentations in Autumn Meeting of JSFP held in Fukui.
  • Development of a novel simple medium for efficient prezoosporulation of Perkinsus olseni(Maeda)
  • Detection of Marteilioides chungmuensis DNA from zooplankton (Kitagawa)
  • Sep. 9-12, 2019 Watanabe, Tiago, and Kawahara had presentations in 19th International Conference on Diseases of Fish and Shellfish in Porto, Portugal.
  • Functional analysis with RNA interference technique of highly expressed protease genes at the invasive and parasitic stages of Cryptocaryon irritans(Watanabe)
  • Impacts of temperature and salinity on the survival and invasion ability of two Anisakis spp. (Nematoda: Anisalidae) in vitro (Tiago)
  • Francisellosis, an emerging disease causing high mortality among cultured Yesso scallops Patinopecten yessoensis in Japan (Kawahara)
  • Aug. 19 -
    Sep. 19, 2019
    Mr. Nguyen Ngoc Chinh (Vietnam Academy of Science and Technology) visited the laboratory for studies of myxosporean parasites.
    Aug. 15, 2019 Associate Professor Ye Ting (Zheijiang Sci-Tech University) arrived at the position of Distinguished Visiting Research Scholar.
    Jul. 29, 2019 Our manuscript “First discovery of Perkinsus beihaiensis in Mediterranean mussels (Mytilus galloprovincialis) in Tokyo Bay, Japan.” was accepted for publication in Journal of Invertebrate Pathology, In Press (Itoh N, Komatsu Y, Maeda K, Hirase S, Yoshinaga T).
    Jul. 14, 2019 Our manuscript “Characterization of the proteases in the parasitic stage of Cryptocaryon irritans, and in vitro and in vivo effects of protease inhibitors on cryptocaryoniasis.” was accepted for publication in Diseases of Aquaculture (Watanabe, Y., How, K. H., Zenke, K., Itoh, N., Yoshinaga, T). Ref.
    Jun. 15, 2019 Our manuscript “Mortality of spats of Manila clum Ruditapes philippinarum experimentally challenged with the protozoan parasite Perkinsus olseni.” was accepted for publication in Fish pathology (Waki T, Yoshinaga T).
    May. 8, 2019 Our manuscript “Parallel studies confirm Francisella halioticida causes mortality in Yesso Scallops Patinopecten yessoensis.” was accepted for publication in Diseases of Aquatic Organisms (Kawahara, Yoshinaga and Itoh; collaboration with DFO Canada). Ref.
    Apr. 22, 2019 The first educational department for fisheries in Myanmar, Department of Fisheries and Aquaculture, was launched in University of Yangon. Dr. Kay Lwin Tun, taking PhD in our laboratory, assumed the professor in this department.
    Mar. 31, 2019 Dr. Hiroshi Yokoyama moved and assumed Professor in Faculty of Veterinary Medicine, Okayama University of Science.
    Mar. 20, 2019 Our manuscript “A novel paramyxean parasite, Marteilia tapetis sp. nov. (Cercozoa) infecting the digestive gland of Manila clam Ruditapes philippinarum from the southeast coast of Korea.” was accepted for publication in Jornal of Invertebrate Pathology (Naoki Itoh; collaboration with Jeju National University). Ref.
    Mar. 8, 2019 Dr. Itoh had a presentation “Novel insights in differentiation of Perkinsus olseni trophozoites into prezoosporangia” in Aquaculture 2019 held in New Orleans LA.
    Mar. 8, 2019 Our manuscript “Worm Cataract of Hatchery-Reared Japanese Dace Tribolodon hakonensis Caused by Diplostomum sp. (Digenea: Diplostomidae).” was accepted for publication in Fish Pathology (Norihiko Komatsu, Naoki Itoh, Kazuo Ogawa). Ref.
    Mar. 2-4, 2019 Dr. Barbara Nowak, a professor of University of Tasmania, came to our laboratory, and we had a seminar on our recent researches.
    • Nymphonella tapetis
    • Red sea bream farm
    • Red sea bream farm
    • Marine white spot disease
    • Tidal flat
    • Manila clams
    • Seriola dumerili
    • Seriola dumerili
    Photographs (from top left)
    Larva of Nymphonella tapetis, Red sea bream farm, Red sea bream infected with C. irritans,
    Tidal flat in Ariake Sea, Manila clams, Seriola dumerili.