2026
Unveiling hidden parasite diversity: Long-read mitogenomics in Eimeriidae and Haemosporida (Eukaryota: Apicomplexa)
Peihang Hong, Sijia Yu, Hau-You Tzeng, Tzu-Chun Chou, Hsin-Yu Lin, Tung Yee Shiu, Yu-Hsuan Lin, Cheng-You Lu, Chao-Min Wang, Cheng-Hung Lai, Shyun Chou, Toshihiro Tokiwa
International Journal for Parasitology 104764-104764 2026
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Neurological and pulmonary angiostrongylosis in a Ryukyu long-furred rat (Diplothrix legata) on Amami-Oshima Island, Japan
So Shinya, Toshihiro Tokiwa, Keita Sakashita, Hisashi Yoshimura, Ryotaro Suzuki, Ryouta Torimoto, Yukinori Muraoka, Masami Yamamoto
Frontiers in Parasitology 2026
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Tsumugi Saito, Honoka Noguchi, Toshihiro Tokiwa, Hisashi Yoshimura, Ryotaro Suzuki, Ryouta Torimoto, Taisei Shiraishi, Kana Matsumoto, Makoto Haritani, Masami Yamamoto
International Journal for Parasitology: Parasites and Wildlife 29 101209-101209 2026
Toshihirio Tokiwa, Kandai Doi
International Journal for Parasitology: Parasites and Wildlife 101213-101213 2026
2025
Co-infection of Dipetalonema species (Nematoda: Onchocercidae) in a captive squirrel monkey (Saimiri sciureus) from China: first molecular characterization of Dipetalonema freitasi
Peihang Hong, Sijia Yu, Tzu-Chun Chou, Hsin-Yu Lin, Tung Yee Shiu, Kwong-Chung Tung, Shyun Chou, Toshihiro Tokiwa
International Journal for Parasitology: Parasites and Wildlife 28 101168 2025
A new Batrachospora species (Apicomplexa: Sarcocystidae) from Duttaphrynus toad in Taiwan
Peihang Hong, Sijia Yu, Chao-Min Wang, Chung-Hung Lai, Toshihiro Tokiwa, Shyun Chou
International Journal for Parasitology: Parasites and Wildlife 28 101136 2025
Toxoplasma gondii infection in the endangered Amami Woodcock, Scolopax mira (Aves: Charadriiformes)
Ryotaro Suzuki, Toshihiro Tokiwa, Keiko Ito, Ryouta Torimoto, So Shinya, Makoto Haritani, Masami Yamamoto, Hisashi Yoshimura
International Journal for Parasitology: Parasites and Wildlife 28 101135 2025
Wild Japanese marten, Martes melampus melampus (Carnivora: Mustelidae), is a new host for zoonotic Thelazia callipaeda eyeworm
Toshihiro Tokiwa, Kandai Doi, Ayaka Kitajima
Ecology and Evolution 15 e71439 2025
A vascular filarial nematode in sika deer (Cervus nippon): Morphological and molecular characterization of Elaeophora (Nematoda: Onchocercidae) in Japan
Toshihiro Tokiwa, Keita Sakashita, Saki Miura, Hisashi Yoshimura, Shiro Matsuo, Toshiaki Yamamoto, Rie Maruko, Junji Moribe, Yasuhiro Takashima, Ayako Yoshida, Kayoko Matsuo
International Journal for Parasitology: Parasites and Wildlife 27 101068 2025
First record of Angiostrongylus cantonensis infection in Diplothrix legata (Rodentia: Muridae) in Tokunoshima Island, Japan
Keita Sakashita, Toshihiro Tokiwa, Ryutaro Suzuki, Taisei I, Mariko Suzuki, Asahi Itoi, Masami Yamamoto, Hisashi Yoshimura
International Journal for Parasitology: Parasites and Wildlife 26 101046 2025
Gnathostoma doloresi in domestic pigs in the Republic of Palau, 2020–2022
Ryo Suzuki, Toshihiro Tokiwa, Takuma Kasahara, Kashgar Rengulbai
Parasitology International 105 103001 2025
A new genus and species of isosporoid coccidium from captive green tree frogs, Ranoidea caerulea (Anura: Hylidae)
Toshihiro Tokiwa, Riona Morizane, Shyun Chou, Donald W. Duszynski
International Journal for Parasitology: Parasites and Wildlife 26 101020 2025
Disseminated proliferative mesocestoidosis caused by Mesocestoides vogae (Cestoda: Cyclophyllidae) in a French bulldog in Japan
Toshihiro Tokiwa, Hisashi Yoshimura, Mami Takase, Eigo Kato, Masateru Morisaki, Tatsushi Morita, Mitsuru Koutaka
The Journal of Veterinary Medical Science 87 2025
2024
New host record of Thelazia callipaeda (Nematoda: Spirurida) with a notably wide host range and shared zoonotic lineage in Japan
Ayaka Kitajima, Toshihiro Tokiwa, Kandai Doi, Kaito Kotani, Hiroko Otsubo, Chinatsu Kamei, Hiromitsu Hitani, Toshiaki Yamamoto, Takuya Kato
Parasitology International 102 102913 2024
Aberrant sparganosis in cat caused by Spirometra mansoni (Cestoda: Diphyllobothriidae)): a case report
Toshihiro Tokiwa, Momo Fushimi, Shyun Chou, Akemi Yoshida, Kensei Kinoshita, Atsushi Hikima, Taisei Kikuchi, Kiyokazu Ozaki
BMC Veterinary Research 20 148 2024
A new species of Demodex (Acari: Demodecidae) from the skin of golden-handed tamarins, Saguinus midas (Primates: Cebidae)
Toshihiro Tokiwa, Kengo Ueda, Nagi Watanabe, Shyun Chou, Kiyokazu Ozaki
International Journal for Parasitology: Parasites and Wildlife 23 100920 2024
2023
Trichinella T9 in wild bears in Japan: Prevalence, species/genotype identification, and public health implications
Masaki Murakami, Toshihiro Tokiwa, Hiromu Sugiyama, Mitsuko Shiroyama, Yasuyuki Morishima, Sota Watanabe, Takato Sasamori, Mami Kondo, Tsutomu Mano, Hifumi Tsuruga
International Journal of Parasitology: Parasites and Wildlife 21 264-268 2023
Molecular characterization of oriental eyeworm (Thelazia callipaeda) detected from raccoon (Procyon lotor) and Japanese raccoon dog (Nyctereutes viverrinus) in Kanto region, Japan
Kandai Doi, Toshihiro Tokiwa, Miyu Imoto, Shyun Chou, Fumiaki Yamasaki, Takuya Kato, Shin-ichi Hayama
Parasites and Vectors 16(1) 116 2023
Detection and characteristics of Proteromonas (Placidozoa: Opalinea) in a pet inland bearded dragon (Pogona vitticeps)
Shyun Chou, Takashi Mohri, Toshihiro Tokiwa
Journal of Exotic Pet Medicine 46 25-26 2023
2022
Three new species of Eimeria (Apicomplexa: Eimeriidae) from the Amami rabbit, Pentalagus furnessi (Mammalia: Leporidae)
Toshihiro Tokiwa, Shyun Chou, Hina Kitazoe, Keiko Ito, Ryouta Torimoto, Yuki Shoshi, Chizu Sanjoba, Masami Yamamoto, Hisashi Yoshimurae
International Journal for Parasitology: Parasites and Wildlife 18 194-200 2022
Detection and characterization of Hyaloklossia kasumiensis (Apicomplexa: Sarcocystidae) from Nagoya Daruma Pond frog, Pelophylax porosus brevipodus
Toshihiro Tokiwa, Chiho Kezuka, Shoto Yamada, Shyun Chou, Shinichi Nakamura
Parasitology International 90(102614) 102614-102614 2022
Genetic characterization of Trichomonas gallinae (Rivolta, 1878) in companion birds in Japan and the genotypical relationship in the Asia region
Shyun Chou, Shinichiro Hadano, Atsushi Kojima, Mario Yorisaki, Masaru Yasuda, Kazunori Ike, Toshihiro Tokiwa
Journal of Microbiology, Immunology and Infection 55 527-534 2022
Black-spotted pond frog Pelophylax nigromaculatus as a new host for the renal coccidian genus Hyaloklossia (Alveolata: Apicomplexa)
Toshihiro Tokiwa, Shyun Chou, Riona Morizane, Natsuhiko Yoshikawa
International Journal for Parasitology: Parasites and Wildlife 17 194-198 2022
Subcutaneous cysticercosis due to Taenia crassiceps (Cestoda: Taeniidae) in an imported steppe lemming in Japan
Shyun Chou, Masato Ozawa, Katsuki Matsubara, Kenichi Tamukai, Toshihiro Tokiwa
Parasitology International 87 102524 2022
2021
Haemoproteus columbae infection in a straggler racing pigeon sheltered in Japan
Fuyumi Yumoto, Toshihiro Tokiwa, Shyun Chou, Michihiro Ueda
The Journal of Veterinary Medical Science 83(11) 1760-1763 2021
Hyaloklossia Labbé, 1896 (Alveolata: Apicomplexa) in frogs: Description of a new species and proposing a new subfamily to accommodate these enigmatic parasites
Toshihiro Tokiwa, Shyun Chou, Yuki Tochigi, Kentaro Katayama, Donald W. Duszynski
International Journal for Parasitology: Parasites and Wildlife 15 199-207 2021
Theileria infection with severe anemia and unhealed fracture in a sika deer Cervus nippon aplodontus (Cervidae: Cetartiodactyla)
Rie Maruko, Toshihiro Tokiwa, Junji Nakai, Shin-ichi Nakamura
Parasitology International 102349 2021
Detection of Eumonospora henryae (Apicomplexa: Sarcocystidae) from Falco columbarius (Falconiformes: Aves): Comparison of host–parasite phylogram and comments on the family Sarcocystidae Poche, 1913
Shyun Chou, Nobumoto Izawa, Kazunori Ike, Toshihiro Tokiwa
International Journal for Parasitology: Parasites and Wildlife 14 75-83 2021
2020
Three new Prototapirella species, Opisthotrichum janus, and Troglocorys cava add to Entodiniomorphida (Ciliophora, Trichostomatia) diversity in mountain gorillas in Rwanda
Akira Ito, Winnie Eckardt, Tara Stoinski, Thomas Gillespie, Toshihiro Tokiwa
European Journal of Protistology 76 125738 2020
First record of infestation of a pet sloth in Japan with the exotic tick Amblyomma geayi (Acari: Ixodidae)
Fumiya Urushiyama, Katsuki Matsubara, Kandai Doi, Masakatsu Taira, Tomoyoshi Komiya, Toshihiro Tokiwa
Parasitology International 78 102157-102157 2020
Resurrection of the genus Eumonospora (Apicomplexa: Sarcocystidae) for Caryospora species without Stieda body
Shyun Chou, Toshihiro Tokiwa, Shinichiro Hadano, Nobumoto Izawa, Michihiro Ueda, Atsushi Kojima, Kazunori Ike
Parasitology International 77 102101 2020
Alien parasitic infections in the endangered Ryukyu long-furred rat (Diplothrix legata) on Amami-Oshima Island, Japan
Toshihiro Tokiwa, Hisashi Yoshimura, Keiko Ito, Shyun Chou, Masami Yamamoto
Parasitology International 76 102058 2020
Detection and molecular characterization of Cryptosporidium species in wild-caught pet spiny-tailed lizards
Rie Kubota, Toshihiro Tokiwa, Katsuki Matsubara, Minoru Okamoto, Kazunori Ike
International Journal for Parasitology: Parasites and Wildlife 11 83-87 2020
Morphologically and genetically diagnosed dermal Dioctophyme larva in a Chinese man: case report
Takuji Tanaka, Toshihiro Tokiwa, Hideo Hasegawa, Teruki Kadosaka, Makoto Itoh, Fumiaki Nagaoka, Haruhiko Maruyama, Yuki Mizuno, Naoki Shirai
SN Comprehensive Clinical Medicine 2 468-471 2020