intermediate host

Japanese: intermediate host（英語表記）intermediatehost

… Some internal parasites require two or more different hosts and have complicated life cycles. In such cases, the host in which the adults infest is called the definitive host, and the host in which the larvae infest is called the intermediate host. For example, in the case of a species of tapeworm that infests the intestines of dogs, cats, bears, and humans, the eggs are excreted in the feces of the host, and if they are successfully introduced into water, they hatch and produce swimming larvae (corachidiae). …

*Some of the terminology that refers to "intermediate host" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…　内部寄生をする動物の中には2種以上の異なる宿主を必要とし，手の込んだ生活環を有するものがある。その場合，成体が寄生する宿主を終宿主，幼生の寄生する宿主を中間宿主intermediate hostと呼ぶ。一例として，イヌ，ネコ，クマ，ヒトなどの腸内に寄生するサナダムシの1種を挙げると，卵は宿主の糞とともに排出され，うまく水中に入ると孵化（ふか）して遊泳性の幼虫(コラキジウム)を生ずる。…

※「intermediate host」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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