评估农田因动物养业务的灰尘对人类病原体污染的可能性
Francisco Garces-Vega1, R Chris Owen2, David Heist2
1Consultant with Human Foods Program, Food and Drug Administration.
概括
集中动物养作业 (CAFO) 的逃离尘埃可以污染产品的病原体,如大肠杆菌O157:H7.7. 这项研究开发了一个模型来预测CAFO附近种植的生菜的污染风险.
科学领域:
- 环境科学 环境科学
- 食品安全 食品安全
- 风险评估 风险评估
背景情况:
- 集中动物养作业 (CAFO) 的逃离尘埃构成人类病原体对产品的污染风险.
- 了解CAFO的病原体扩散对于食品安全和公共卫生至关重要.
研究的目的:
- 开发一个一般的框架和方法来预测从CAFO衍生的逃逸尘埃中产生的人类病原体的预收前产品污染.
- 将本框架应用于一个涉及在牛CAFO附近种植的生菜的案例研究.
主要方法:
- 利用美国环保署的AERMOD分散模型评估大CAFO周围100平方公里面积的尘埃分散和沉积情况.
- 关于尘埃沉积,肥料中的病原体水平和作物上的病原体存活率的综合数据,用于风险评估.
- 使用定量风险评估方法预测大肠杆菌O157:H7污染在生菜上.
主要成果:
- CAFO尘埃可以沉积在至少100平方公里的区域,大肠杆菌O157:H7的分散受天气和排放因素的影响.
- 预计大肠杆菌O157:H7度在生菜上随着距离CAFO的距离的增加而下降.
- 在收获前的生菜上,病原体的存活率主要与收获后两周内沉积的尘埃有关.
结论:
- 开发的建模方法提供了一个灵活的框架,用于预测CAFO灰尘的病原体污染风险.
- 这种方法可以适应各种地点,以支持食品传播疾病调查和预防策略.
- 量化预测为风险管理提供信息,并增强与动物养操作附近种植的产品相关的食品安全实践.
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