在适当冷藏的原奶中抑制病原体
M E Coleman1, T P Oscar2, T L Negley3
1Coleman Scientific Consulting, Groton, NY, United States of America.
PloS one
|December 12, 2023
概括
这项研究发现Listeria monocytogenes在生牛奶中生长,但常见的食源性病原体,如Campylobacter,大肠杆菌O157:H7和沙门氏菌在4.4°C的14天内不会生长.
科学领域:
- 食品安全 食品安全
- 微生物学 微生物学
- 公共卫生 公共卫生
背景情况:
- 关于生牛奶中的病原体存活率存在相互矛盾的数据.
- 用于消费的清洁生产的生牛奶需要明确的病原体数据.
- 了解病原体动态对于风险评估至关重要.
研究的目的:
- 调查原牛奶的病原体生长和下降趋势.
- 提供关于特定的食物传播病原体行为的最终数据.
- 为了解决关于病原体与生牛奶微生物群相互作用的假设.
主要方法:
- 使用坎皮洛巴克,大肠杆菌O157:H7,单细胞菌李斯特菌和沙门氏菌对生牛奶进行注射.
- 储存在4.4°C,用标准培养方法在14天内量化.
- 统计分析包括曼-肯德尔趋势测试和差异分析.
主要成果:
- 在12个复制品中的8个中,Listeria monocytogenes显示出显著的增长 (P = 0.001到P = 0.028).
- 差异分析证实L. monocytogenes在低和高注射水平的第二周增加.
- 在14天内没有观察到坎皮洛巴克,大肠杆菌O157:H7或沙门氏菌的生长迹象.
结论:
- 在冷藏下,Listeria monocytogenes可以在生牛奶中繁殖.
- 在这项研究中,常见的生牛奶病原体 (Campylobacter,大肠杆菌O157:H7,沙门氏菌) 没有显示出增长.
- 需要进一步的研究,以精确的病原体行为数据来完善风险评估.
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