The study also showed that the compound was active against all three major species of Schistosoma worms that infect humans.

研究还表明，这种化合物可以有效作用于三种引起人类感染的主要血吸虫种。

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Lymphatic filariasis is caused by infection with nematodes (round worms) of the family Filariodidea. There are three types of these thread-like filarial worms.

淋巴丝虫病的发病是因感染丝虫目线虫(圆形)引起。

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First, this paper introduces three basic worms propagation models and analyzes four situations after the introduction of benign worm.

首先介绍三个基本的蠕虫传播模型，分析了引入良性蠕虫后的四种情况。

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Footage of three-foot worms and carnivorous starfish feasting on a seal carcass at the bottom of the Antarctic, from the Life series, was shown on screens during the show.

BBC: Bjork opens Manchester International Festival

Boosting the activity of sirtuins in yeast, nematode worms and fruitflies (three rapidly reproducing stalwarts of biological laboratories) does indeed result in longer lifespans.

ECONOMIST: How to live longer��maybe