...Also, if the gravid proglottid of the oocyte breaks in the human intestine and many eggs are released, the oncocysts may cause self-infection, and the human may act as an intermediate host, forming cysts in the muscles, brain, eyes, heart, etc., causing human oncocysticercosis. On the other hand, in the case of the oocyte Echinococcus granulosus and the oocyte E. multilocularis , the definitive hosts are dogs and foxes, and humans are the intermediate hosts. Infection occurs mainly by orally ingesting eggs attached to dog hair, but the oncocysts hatch in the upper part of the small intestine and penetrate the intestinal wall, reaching various organ tissues such as the liver, lungs, and brain, forming hydatids, which cause fatal harm to humans (hydatid disease). ... *Some of the terminology that mentions "Echinococcus granulosus" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…またユウコウジョウチュウの受胎片節がヒトの腸管内で破損し多数の虫卵が遊離した場合,六鉤幼虫が自家感染を起こし,ヒトがあたかも中間宿主のようになって囊虫が筋肉,脳,目,心臓などに形成され,人体有鉤囊虫症を起こすことがある。一方,タンホウジョウチュウEchinococcus granulosusやタホウジョウチュウE.multilocularisの場合,終宿主はイヌ,キツネなどで,ヒトは中間宿主である。主としてイヌの体毛に付着した虫卵を経口摂取して感染するが,六鉤幼虫は小腸上部で孵化して腸壁に穿入(せんにゆう)し,肝臓,肺,脳などいろいろな臓器組織に至って包虫を形成し,ヒトに致命的な害(包虫症)を与える。… ※「Echinococcus granulosus」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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