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贾第鞭毛虫(Giardialamblina)和隐孢子虫(Cryptosporidium)是一类寄生于人和动物体内的肠道原虫,饮用了含有这些原虫包囊(cystes)或卵囊(oocysts)的水可引起消化道感染。贾第鞭毛虫的包囊和隐孢子虫的卵囊在受生活污水污染的地面水和防护差的地下水及处理不良的自来水中均可检
Giardia lamblina and Cryptosporidium are a group of intestinal protozoa parasitic to humans and animals. Drinking water containing the cystes or oocysts of these protozoa can cause gastrointestinal infection. Cysts of Giardia and Cryptosporidium oocysts are detectable both in surface water contaminated with domestic sewage and in poorly protected groundwater and poorly maintained tap water