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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This was, after all, an agricultural area, especially renowned for producing silk worms, silk thread and silk fabric.

毕竟，这里是农业地区，尤以出产桑虫、蚕丝和丝绸闻名。

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