Dugesia japonica ; oocyst ; superoxide dismutase ; catalase ; glutathione peroxidase .

涡虫；卵囊；超氧化物歧化酶；过氧化氢酶；谷胱甘肽过氧化物酶。

Observation on cryptosporidium of ultrastructure and oocyst shedding .

隐孢子虫的超微结构及排囊的观察。

The morbidity and mortality of the host species is usually proportional to the number of cocidial oocyst ingested .

宿主的发病率和死亡率与吃进球虫卵囊的数目，通常是成正比的。