本powerpoint演示首先简要概述了渥太华的供水系统。介绍了定量微生物风险评估（QMRA）的关键计算步骤，以及加拿大卫生部QMRA模型，该模型产生的主要估计值；微生物病原体从水源水传播到自来水的可能性；被感染的可能性，如果剂量为 摄入的病原体（人类喂养研究）；衡量疾病对人类的影响；量化微生物病原体的风险，渥太华市应用QMRA模型的案例研究，以及使用QMRA模型的优势和挑战。包括表格、数字。

This powerpoint presentation begins by providing a brief overview of Ottawa's water supply system. Key calculation steps for quantitative microbial risk assessment (QMRA) are presented, along with the Health Canada QMRA Model, the primary estimates produced by the model; the probability that a microbial pathogen will pass from source water to tap; the probability of infection, given a dose of pathogens ingested (human feeding studies); measuring the human impact of illness; quantifying risks from microbial pathogens, a case study with the City of Ottawa that applied the QMRA model, and advantages and challenges of using a QMRA model. Includes tables, figures.