目前的总大肠菌群规则（TCR）在评估 水系统——尤其是小型系统——脆弱性 水传播的疾病暴发？ 作者认为目前的TCR是不够的 用于预测系统对原生动物爆发的脆弱性 还有病毒。根据采样频率的不同 当前的TCR可能足以预测系统的脆弱性 致病菌。 作者的结论是，额外的微生物指标是 需要预防原生动物和病毒的暴发。在里面 特别是，对于较小的样本，需要更高的采样频率 社区。 此外，应补充常规监测 通过卫生调查和其他措施来监测情况 这可能表明存在潜在污染。 由于这些不足之处，可能需要进行额外的修订 TCR需要。值得注意的是 拟议的地下水规则可能有助于防止 暴发。 对于负面影响，水资源管理者不应自满 应在常规监测期间获得大肠菌群 持续评估潜在的污染源，因为 即使没有超过TCR，疫情也可能发生。包括12个参考文献和表格。

How useful is the current Total Coliform Rule (TCR) in assessing water systems' - especially small systems' - vulnerability to a waterborne outbreak? The authors determined that the current TCR is not sufficient for predicting a system's vulnerability to an outbreak from protozoa and viruses. Depending on the frequency of sampling, the current TCR may be adequate for predicting a system's vulnerability to bacterial pathogens. The authors concluded that additional microbial indicators are needed to guard against outbreaks from protozoa and viruses. In particular, greater frequency of sampling is needed for smaller communities. Further, routine monitoring should be supplemented with sanitary surveys and other measures to monitor conditions that may indicate potential contamination. Because of these inadequacies, additional revisions may be needed for the TCR. It is worth noting that provisions within the proposed Ground Water Rule may help prevent outbreaks. Water managers should not be complacent with regard to negative findings obtained during routine coliform monitoring and should continually assess potential sources of contamination, because outbreaks can occur even when the TCR has not been exceeded. Includes 12 references, tables.