The excrement and the excrement polluted water carry a lot of pathogens of them, including the diseaseful virus and worm eggs, which threaten seriously the health of the habitants. 糞便中和被糞便污染的飲用水中，含有多種腸道傳染病和寄生蟲(chóng)病的病原體，包括致病的病毒和蟲(chóng)卵，嚴重威脅農民的身體健康。
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