湖北省市售猪肉中单核细胞增生李斯特菌污染的定量风险评估
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1.宜昌市疾病预防控制中心;2.国家食品安全风险评估中心

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2023年度宜昌市医疗卫生研究项目(A23-1-086)


Quantitative risk assessment of Listeria monocytogenes in retail pork of Hubei Province
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1.Yichang Center for Disease Control and Prevention;2.China National Center for Food Safety Risk Assessment

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    摘要:

    目的 通过对市售生鲜猪肉中单增李斯特菌从零售到食用阶段污染水平进行评估,并结合其对即食食品的交叉污染,来预测人群发病风险。方法 基于湖北省监测结果确定猪肉中单增李斯特菌的污染水平,运用生长预测模型和交叉污染模型,采用蒙特卡罗方法进行模拟分析,估计厨房内猪肉对即食食品的污染水平,并结合剂量反应模型,推算人群健康风险。结果 冷猪肉和热鲜肉经交叉污染转移到即食食品中的单增李斯特菌量分别为1.30CFU和1.90CFU,由此导致得到易感人群年发病概率为2.52×10-9-7.62×10-9,非易感人群年发病概率为2.61×10-11-6.86×10-11。敏感性分析结果表明,处理生猪肉后制作即食食品的比例、每天猪肉食用量、猪肉的初始污染水平是影响发病风险的主要因素。结论 湖北省市售猪肉中单增李斯特菌导致居民发病概率较低,为进一步降低居民健康风险,建议从源头上降低猪肉中单增李斯特菌的污染水平,并引导居民规范家庭厨房操作和烹饪等消费行为习惯,降低防范猪肉处理过程中的交叉污染。

    Abstract:

    Objective To predict the risk of population morbidity by evaluating the contamination level of Listeria monocytogenes in commercially available fresh pork from the retail to the con consumption stage and combining it with its cross-contamination of ready-to-eat food. Methods Based on the monitoring results in Hubei Province to determine the contamination level of Listeria monocytogenes in pork, a growth prediction model and a cross-contamination model were applied, and a Monte Carlo method was used for simulation and analysis to estimate the level of contamination of ready-to-eat foods by pork in the kitchen and to project the population health risk in combination with a dose-response model. Results The amount of Listeria monocytogenes transferred to ready-to-eat food by cross-contamination was 1.30 CFU and 1.90 CFU for chilled and hot pork, respectively, which resulted in obtaining an annual probability of morbidity of 2.52×10-9-7.62×10-9 for susceptible population and 2.61×10-11-6.86×10-11 for non-susceptible population. The results of the sensitivity analyses showed that the treatment of of raw pork followed by preparation of ready-to-eat food, daily pork consumption, and initial contamination level of pork were the main factors affecting the risk of morbidity. Conclusion The probability of Listeria monocytogenes in commercially available pork in Hubei Province causing morbidity in residents is low. To further reduce the health risk to residents, it is recommended to reduce the contamination level of Listeria monocytogenes in pork at source and to guide residents to regulate household kitchen operation and cooking consumption habits, and reduce the prevention of cross-contamination in pork handling.

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  • 收稿日期:2024-08-15
  • 最后修改日期:2025-03-26
  • 录用日期:2025-04-10
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