传统地表水生产的饮用水 具有典型隐孢子虫水平的水处理厂 水源水中的卵囊可能会 公共健康处于危险之中。这项研究证明，卵囊 突破治疗障碍可以活下来 在体外人类细胞培养条件下具有传染性。 研究表明，地表水源和 成品饮用水可能受到污染 隐孢子虫卵囊。然而，没有一种方法 在这些研究中使用，也不是目前批准的美国 环境保护局诊断技术 对于合规性测试，我们能够确定 结果的健康意义在于这些方法 不要测量微小隐球菌的传染性。 本文中的研究表明 90%的成品水样对隐孢子虫呈阳性 发生在过滤后的饮用水样本中 低浊度和微生物指标 如芽孢杆菌、梭菌和噬菌体 与隐孢子虫的发生无关。 因为所有分析的参数都不能 说明传染病的发生 结论是，处理后的水中存在隐孢子虫 传统处理厂面临风险 为了突破传染性卵囊。由于 在这项研究中，作者建议 应使用替代消毒方法进行改进 保护公众健康的技术。包括36个参考文献、表格、图表。

Drinking water produced by conventional surface water treatment plants with typical levels of Cryptosporidium oocysts in source waters might put public health at risk. This study proves that oocysts that break through the treatment barriers could be alive and infectious under in vitro human cell culture conditions. Studies have shown that surface source waters and finished drinking water might be contaminated with Cryptosporidium oocysts. However none of the methods used in these studies, nor the currently approved US Environmental Protection Agency diagnostic techniques for compliance testing, are able to determine the public health significance of the results because those methods do not measure the infectivity of C. parvum. The study presented in this article showed that 90% of the finished water samples positive for Cryptosporidium occurred in filtered drinking water samples with low turbidities and that microbial indicators such as Bacillus, Clostridium, and phage were not associated with Cryptosporidium occurrence. Because none of the parameters analyzed could account for the occurrence of infectious Cryptosporidium in the treated water, it was concluded that conventional treatment plants are at risk for breakthrough of infectious oocysts. As a result of this study, the authors recommend that treatment should be improved using alternative disinfection techniques to preserve public health. Includes 36 references, tables, figures.