| 翻訳と辞書 |
| Echinostoma hortense ： ウィキペディア英語版 |
Echinostoma hortense
''Echinostoma hortense'' is an intestinal fluke of the class Trematoda, which has been found to infect humans in East Asian countries such as Korea,〔Chang-Min CHO, Won-Young TAK, Young-Oh KWEON, Sung-Kook KIM, Yong-Hwan CHOI, Hyun-Hee KONG and Dong-Il CHUNG. A human case of Echinostoma hortense (Trematoda: Echinostomatidae) infection diagnosed by gastroduodenal endoscopy in Korea The Korean Journal of Parasitology Vol. 41, No. 2. 117-120, June 2003〕 China, and Japan. This parasite resides in the intestines of birds, rats and other mammals such as humans. While human infections are very rare in other regions of the world, East Asian countries have reported human infections up to about 24% of the population in some endemic sub-regions. ''E. hortense'' infections are zoonotic infections, which occurs from eating raw or undercooked freshwater fish.〔Jong-Yil Chai, Eun-Hee Shin, Soon-Hyung Lee and Han-Jong Rim. Foodborne Intestinal Flukes in Southeast Asia. Korean J Parasitol. Vol. 47, Supplement: S69-S102, October 2009〕 The primary disease associated with an ''E. hortense'' infection is called echinostomiasis, which is a general name given to diseases caused by Trematodes of the genus ''Echinostoma''.〔Chai JY, Hong ST, Lee SH, Lee GC, Min YI (1994) A case of echinostomiasis with ulcerative lesions in the
duodenum. Korean J Parasitol 32: 201-204.〕
==Life cycle==
The eggs of ''E. hortense'' are passed in the feces of the definitive host. Eggs that have reached water will mature within 6~15 days. Once hatched, the short-lived miracidia seek out and infect freshwater snails such as ''Lynnaea pervia'' and ''Radix auricularia coreana''. Inside the snail, mother sporocysts develop from the germinal cells of the miracidia and usually migrate to a site such as the heart. The mother sporocysts reproduce asexually to generate many mother rediae. The mother rediae migrates to the digestive glands of the snail where it produces many daughter rediae. For the duration of the snail's life the daughter rediae generate cercariae after feeding on the snail's gonads. In the water, the cercariae seek out and penetrate the body surface or orifice of a second intermediate host, which is usually a fish, leech, tadpole, or another snail. Once inside the second intermediate host, the cercariae encyst into metacercariae and remain dormant for many months until the second intermediate host is eaten by a definitive host.〔Heejeong Youn. 2009(October).Review of Zoonotic parasites in Medical and Veterinary Fields in the Republic of Korea.Korean J Parasitol. Vol. 47, Supplement: S133-S141〕 Inside the definitive host, the metacercariae attach to the walls of the small intestine and mature into adults.〔Schmidt, G. D., and L. S. Roberts. 2009. Foundations of Parasitology, 8th ed. Times Mirror/Mosby College Publishing Company, St. Louis, Missouri, p. 414-417.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Echinostoma hortense」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|