title: Human infection by acanthocephalan parasites belonging to the genus Corynosoma found from small bowel endoscopy.
abstract: A 73-year-old man with a suspected ileus in January 2013 and subsequently suffered melena in February 2014 was endoscopically examined. As a result of the examinations, unidentified species of Corynosoma sp. and Corynosoma villosum were recovered from the small intestine, further endoscopic diagnosis suggested relevance between abdominal pain and the present infections in the small intestine. The recovered worms were composed of gravid females with developed eggs, suggesting that these parasites can survive for a long time in the intestine after infection. In this case, the short interval between infections appears to be due to the individual's eating habits which consist of regularly consuming uncooked seafood.
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan. Electronic address: tomoki-fujita@otaru-ekisaikai.jp.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Fujita
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Eriko
authors.initials: E
authors.lastname: Waga
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kitaoka
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Imagawa
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Yuuya
authors.initials: Y
authors.lastname: Komatsu
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Takanashi
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Fumie
authors.initials: F
authors.lastname: Anbo
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Tomonori
authors.initials: T
authors.lastname: Anbo
authors.affiliation: Department of Medical Gastroenterology, Otaru-Ekisaikai Hospital, 1-4-1Inaho, Otaru, Hokkaido 047-0032, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Katuki
authors.affiliation: Department of Diagnostic Pathology, Sapporo-Kosei General Hospital, N3W8-5 Chuo-ku, Sapporo, Hokkaido 060-0033, Japan.
authors.forename: Shin
authors.initials: S
authors.lastname: Ichihara
authors.affiliation: Department of Internal Medicine, Division of Gastroenterology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8603, Japan.
authors.forename: Shunji
authors.initials: S
authors.lastname: Fujimori
authors.affiliation: Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamasaki
authors.affiliation: Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Morishima
authors.affiliation: Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan.
authors.forename: Hiromu
authors.initials: H
authors.lastname: Sugiyama
authors.affiliation: Graduate School of Environmental Earth Science, Hokkaido University, N10W5 Kita-ku, Sapporo, Hokkaido 060-0810, Japan; National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Nishi-2-13 Inada-cho, Obihiro, Hokkaido 080-8555, Japan.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Katahira
mesh_terms: D000049:Acanthocephala / Q000302:isolation & purification*; D000368:Aged; D000818:Animals; D016099:Endoscopy, Gastrointestinal; D005260:Female; D006373:Helminthiasis / Q000175:diagnosis* / Q000469:parasitology*; D006801:Humans; D007421:Intestine, Small / Q000469:parasitology*; D008297:Male; D008551:Melena / Q000175:diagnosis / Q000469:parasitology; D066256:Raw Foods / Q000469:parasitology; D017747:Seafood / Q000469:parasitology
keywords: Acanthocephala; Corynosoma; Human infection; Ileus; Small intestine