title: Migration of Neodiplostomum leei (Digenea: Neodiplostomidae) neodiplostomula to the livers of various mammals.
abstract: Of morphologically indistinguishable small-sized neodiplostomula in the grass snake Rhabdophis tigrina in the Republic of Korea, some, such as Neodiplostomum seoulense, mature into adults in the intestines of rodents, whereas others, such as Neodiplostomum leei, migrate to rodent livers and mature in the intestines of chicks. In the present study, we aimed to observe in more detail the extraintestinal migration and development of N. leei by using various animal models, i.e., mice, rats, hamsters, rabbits, cats, and chicks. In mammals, small-sized neodiplostomula (N. leei) inoculated orally penetrated the intestinal wall, entered the peritoneal cavity, and oriented to the liver without passing through any other organ. In rodent livers, the neodiplostomula were surrounded by host inflammatory cells and fibrotic tissues from day 10 postinfection (PI); the worms were found dead by day 56 PI. When neodiplostomula from rodent livers were transferred orally to mammals, they reoriented to the liver, although they were able to develop into adults in the chick intestine by day 6-7 PI. The possibility of human infections, i.e., liver migration, by N. leei neodiplostomula, among snake consumers, warrants investigation.
authors.affiliation: Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul 110-799, Korea.
authors.forename: Eun-Hee
authors.initials: EH
authors.lastname: Shin
authors.forename: Il-Myung
authors.initials: IM
authors.lastname: Kim
authors.forename: Jae-Lip
authors.initials: JL
authors.lastname: Kim
authors.forename: Eun-Taek
authors.initials: ET
authors.lastname: Han
authors.forename: Yun-Kyu
authors.initials: YK
authors.lastname: Park
authors.forename: Yukifumi
authors.initials: Y
authors.lastname: Nawa
authors.forename: Jina
authors.initials: J
authors.lastname: Kook
authors.forename: Soon-Hyung
authors.initials: SH
authors.lastname: Lee
authors.forename: Jong-Yil
authors.initials: JY
authors.lastname: Chai
mesh_terms: D000818:Animals; D002415:Cats; D002645:Chickens; D017812:Colubridae; D006224:Cricetinae; D005260:Female; D006790:Host-Parasite Interactions; D007421:Intestine, Small / Q000469:parasitology; D008099:Liver / Q000469:parasitology* / Q000648:ultrastructure; D008109:Liver Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D008297:Male; D008647:Mesocricetus; D051379:Mice; D008807:Mice, Inbred BALB C; D011817:Rabbits; D051381:Rats; D017207:Rats, Sprague-Dawley; D013047:Specific Pathogen-Free Organisms; D014200:Trematoda / Q000502:physiology* / Q000648:ultrastructure; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary*