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Devin Daeschel1, Long Chen2, Claire Zoellner3
1Department of Food Science, Cornell University Department of Food Science, Ithaca, New York, USA.
Applied and environmental microbiology
|April 17, 2025
概括
建模模拟表明,用奶粉冲洗加工线路有效降低了奶粉中的沙门氏菌污染. 这种方法有助于评估清洁干预措施,并为验证研究选择合适的替代品.
科学领域:
- 食品安全 食品安全
- 微生物污染的原因
- 风险评估 风险评估
背景情况:
- 低水分食品中的沙门氏菌爆发通常与环境交叉污染有关.
- 有效的清洁策略对于防止病原体从加工设备转移到食品至关重要.
研究的目的:
- 用蒙特卡洛模拟来建模沙门氏菌对奶粉的交叉污染.
- 评估不同清洁干预措施的有效性,包括干擦和冲洗.
- 评估模型在清洁验证中选择沙门氏菌替代物的实用性.
主要方法:
- 蒙特卡洛模拟用于模拟从不钢表面到奶粉中的沙门氏菌交叉污染.
- 输入参数包括从干擦和转移系数减少日志.
- 该模型模拟了污染漏洞的场景,并评估了清洁干预措施,例如用不同数量的奶粉冲洗.
主要成果:
- 一个2日志CFU污染违规导致72 [24, 96]受污染的奶粉单位.
- 干燥擦拭使污染单位减少到26个 [12, 64].
- 用150公斤或300公斤奶粉冲洗使污染单位分别减少到0 [0,41]和0 [0,16]. 肠球菌表现出与沙门氏菌相似的污染水平.
结论:
- 建模是评估交叉污染和比较清洁干预措施的宝贵决策支持工具.
- 用足够的奶粉冲洗加工线路是减轻沙门氏菌污染的有效方法.
- 模拟模型为在清洁验证研究中比较沙门氏菌替代品提供了可靠的替代方案.
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