title: Two Echinostome Species, Pegosomum bubulcum and Nephrostomum ramosum (Digenea: Echinostomatidae), from an Eastern Cattle Egret, Bubulcus ibis coromandus, in Republic of Korea.
abstract: We describe 2 echinostome species recovered from an Eastern cattle egret, Bubulcus ibis coromandus, from Cheongju-si (city), Chungcheongbuk-do (province), Korea. Total 72 Pegosomum bubulcum specimens were recovered from the bile duct. They were 7,566×2,938 μm in average size and had 27 collar spines with vitelline extension from anterior 1/3 level of the esophagus to mid-level of the posterior testis as characteristic features. Total 9 specimens of Nephrostomum ramosum were recovered in the small intestines of the bird. They were ribbon-shaped, 11,378×2,124 μm in average size, and morphologically variable in some organs, i.e., the number of collar spines (47-50), the shape of ovary and testes, and the extension of vitelline follicles. These morphological variations observed in a single host indicated that these features are not critical for the classification of Nephrostomum species and thus were reconsidered taxonomically as synonym of N. ramosum. This study is the first report documenting and describing both flukes and their associated genera in Korea.
authors.affiliation: Department of Parasitology, Medical Research Institute and Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Seongjun
authors.initials: S
authors.lastname: Choe
authors.affiliation: Department of Parasitology, Medical Research Institute and Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Dongmin
authors.initials: D
authors.lastname: Lee
authors.affiliation: Department of Parasitology, Medical Research Institute and Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Hansol
authors.initials: H
authors.lastname: Park
authors.affiliation: Department of Parasitology, Medical Research Institute and Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Hyeong-Kyu
authors.initials: HK
authors.lastname: Jeon
authors.affiliation: The Wildlife Center of Chungbuk, Cheongju 28116, Korea.
authors.forename: Youngsun
authors.initials: Y
authors.lastname: Lee
authors.affiliation: The Wildlife Center of Chungbuk, Cheongju 28116, Korea.
authors.forename: Eunju
authors.initials: E
authors.lastname: Kim
authors.affiliation: The Wildlife Center of Chungbuk, Cheongju 28116, Korea.|College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Ki-Jeong
authors.initials: KJ
authors.lastname: Na
authors.affiliation: Department of Parasitology, Medical Research Institute and Parasite Resource Bank, School of Medicine, Chungbuk National University, Cheongju 28644, Korea.
authors.forename: Keeseon S
authors.initials: KS
authors.lastname: Eom
mesh_terms: D000818:Animals; D001652:Bile Ducts / Q000469:parasitology; D001715:Bird Diseases / Q000469:parasitology*; D001717:Birds; D004450:Echinostomatidae / Q000033:anatomy & histology / Q000145:classification* / Q000302:isolation & purification*; D007421:Intestine, Small / Q000469:parasitology; D008853:Microscopy; D056910:Republic of Korea; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary*
keywords: Bubulcus ibis coromandus; Nephrostomum ramosum; Pegosomum bubulcum; cattle egret; echinostome; parasite