在源头或后期加工的整个罗马菜和冷藏期间的新鲜切割产品上,微生物群的差异性转移
Ganyu Gu1, Qiao Ding2, Marina Redding1
1Environmental Microbial and Food Safety Laboratory, USDA ARS, Beltsville, MD 20705, United States of America.
International journal of food microbiology
|March 8, 2024
概括
罗马菜 (绿叶蔬菜) 的后期加工与原始加工相比,增加了微生物负载并降低了质量. 这影响了食品安全和绿叶蔬菜的质量.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 农业科学 农业科学
背景情况:
- 罗马菜是加利福尼亚和亚利桑那州的主要作物,在当地加工 (源加工) 或运输以进行远程加工 (转发加工).
- 最近与罗马菜相关的Escherichia coli O157:H7疫情引发了人们对前期加工对食品安全的影响的担忧.
研究的目的:
- 调查来源与前期加工对罗马菜微生物安全性和质量的影响.
- 分析整个供应链中生菜微生物群的变化和产品质量指标.
主要方法:
- 追踪罗马菜从农场到加工,在来源和转发道.
- 收集全头和新鲜切割的生菜样本进行微生物学和质量分析.
- 利用16S rRNA基因的高通量安普利康序列测序来对微生物群落进行分析.
主要成果:
- 与源处理相比,在前期加工的生菜中观察到总有氧细菌和大肠杆菌的数量显著更高.
- 微生物群的组成根据加工类型 (来源与前期) 和储存时间不同,发生了不同的转移.
- 与前期加工的罗马菜相比,在源头加工的罗马菜的质量得分明显更高,特别是在储存2周后.
结论:
- 与原始加工相比,罗马菜的进一步加工与微生物负载的增加和产品质量的降低有关.
- 加工延误和前期加工的物流负面影响了罗马菜的安全性和质量.
- 优化加工策略对于保持罗马菜的食品安全和质量至关重要.
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