...In this parasite, the coracidium formed in the eggs hatches in water and is ingested by the first intermediate host, the water flea, to become procercoids. When this is ingested by the second intermediate host, a fish, it develops in the fish flesh and becomes a string-like plerocercoid. In Japan, important second intermediate hosts include cherry salmon, pink salmon, rainbow trout, and salmon, and humans become infected by ingesting the plerocercoids when eating raw fish, which then develop into adults in the small intestine. ... *Some of the terminology that mentions "plerocercoid" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このジョウチュウでは,虫卵内に形成されたコラキディウムは水中で孵化(ふか)し,第1中間宿主のケンミジンコに摂取されてプロケルコイドprocercoidとなる。これが第2中間宿主の魚類に摂取されると,魚肉内で発育して紐状のプレロケルコイドplerocercoidとなる。日本で第2中間宿主として重要なものは,サクラマス,カラフトマス,ニジマス,サケなどであり,ヒトはこれらの魚肉の生食の際プレロケルコイドを摂取して感染し,これが小腸で成虫になる。… ※「plerocercoid」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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