定量微生物风险评估框架 纳入带有Legionella pneumophila生长率的水年
Emily Clements1, Katherine Crank1, Robert Nerenberg2
1Southern Nevada Water Authority, P.O. Box 99954, Las Vegas, Nevada 89193, United States.
Environmental science & technology
|April 4, 2024
概括
管道系统中的水年龄直接影响了军团菌细菌水平. 通过清洗来减少水的老化,降低了感染风险,特别是在严重的疾病中,使得场所的管道更安全.
科学领域:
- 环境微生物学环境微生物学
- 公共卫生 公共卫生
- 水利工程是水利工程.
背景情况:
- 水的年龄是一个间接的水质指标.
- 直接评估水龄的微生物风险是未充分利用的.
- 肺炎菌 (Legionella pneumophila) 在建筑物管道中构成严重的健康风险.
研究的目的:
- 直接将水的年龄与Legionella pneumophila度直接联系起来.
- 量化淋浴的微生物风险 (感染和严重疾病的可能性).
- 评估降低风险的策略,如设备清洗.
主要方法:
- 利用生长模型将水年龄与Legionella pneumophila度联系起来.
- 对淋浴暴露进行了定量微生物风险评估 (QMRA).
- 模拟风险降低场景使用计划和智能净化设备.
主要成果:
- 在所有情景中,年均感染概率 (P_inf) 均超过了10^-4基准值.
- 临床严重疾病的年均概率 (P_csi) 仍然低于10^-4.
- 计划和智能清洗显著降低了PCI和水消耗.
结论:
- 水的年龄是雷地昂内拉风险评估的一个关键因素.
- 清洗场所的管道设备有效地减轻了微生物的风险.
- 智能清洗提供了一种节水的方法,以保持低健康风险.
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