对贾第虫囊肿和隐孢子虫卵囊的去除进行了为期两年的评估，分别在一个900 gpm的全尺寸水处理厂和一个0.5 gpm的中试厂进行，这两个工厂均在常规处理和直接过滤制度下运行。原水水质（浊度和藻类含量）以及去除浊度的处理效果，比处理方式更能控制种子囊肿的去除。囊肿清除率和相应大小颗粒的清除率之间存在高度相关性； 囊肿和浊度去除之间的相关性较差，而囊肿的去除和异养细菌之间没有相关性。包括27个参考文献、表格和图表。

A two-year evaluation of Giardia cyst and Cryptosporidium oocyst removal was conducted at a full-scale 900-gpm water treatment plant and at a 0.5-gpm pilot plant, both operated under conventional treatment and direct filtration regimes. Raw water quality (turbidity and algal content), as well as treatment effectiveness in removing turbidity, controlled the removal of seeded cysts more than the mode of treatment. A high correlation was found between cyst removal rates and removal of the respective size particles; poorer correlation was found between the cysts and turbidity removal, whereas no correlation was established between the removals of cysts and heterotrophic bacteria. Includes 27 references, tables, figures.