热水和冷空气的应用,以减少肉尸体上的细菌污染
Anja Beterams1, Alina Kirse2, Lothar Kreienbrock2
1Department of Biological Safety, German Federal Institute for Risk Assessment, Berlin, Germany.
Frontiers in microbiology
|October 8, 2024
概括
热水浸泡和冷空气处理有效地减少了 brojiler尸体上的动物传染病原体. 热水更有效,显著降低了沙门氏菌和坎皮洛巴克特菌的负载,而冷空气对坎皮洛巴克特菌和大肠杆菌的温和降低.
科学领域:
- 食品科学与技术 食品科学与技术
- 微生物学 微生物学
- 动物科学动物科学
背景情况:
- 肉尸上的类病原体,如坎皮洛巴克特和沙门氏菌,对食品安全构成重大风险.
- 有效的净化方法对于降低家禽肉生产中的病原体负荷至关重要.
研究的目的:
- 评估物理消毒方法 (热水浸泡和冷空气) 对肉尸体的有效性.
- 为了确定不同温度和暴露时间对病原体减少的影响.
主要方法:
- 肉尸体经过热水 (70-80°C) 或冷空气 (-90°C) 处理,暴露时间不同.
- 分析包括坎比洛巴克,沙门氏菌,大肠杆菌和总殖民地数 (TCC) 的列举.
- 使用可活/死qPCR (v-qPCR) 评估了可活但不可培养 (VBNC) 坎皮洛巴克特细胞.
主要成果:
- 热水浸泡 (70-80°C,20-30秒) 显著减少了沙门氏菌和坎皮洛巴克特大约1log10 CFU/ml.
- 冷空气 (-90°C) 将坎皮洛巴克特减少了0.4-0.5 log10 CFU/ml,而大肠杆菌则减少了高达0.8 log10 CFU/ml.
- 热水处理也使TCC降低了0.6-0.9 log10 CFU/ml,但对大肠杆菌没有显著的减少.
结论:
- 热水浸泡是一种比冷空气暴露更有效的肉尸体物理消毒方法.
- 这些物理处理显示出在减少病原体负载和提高 brojiler肉类安全方面实际应用的潜力.
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