超市和农场生猪肉中的细菌群体结构通过高通量测序分析确定
Ge Zhao1,2,3, Na Lv4, Wenjun Xiang1,2,3,5
1Laboratory of Pathogenic Microorganisms Inspection, Livestock and Poultry Products Quality & Safety Risk Assessment Laboratory (Qingdao) of MARA, China.
Foodborne pathogens and disease
|February 18, 2025
概括
对生猪肉的细菌分析显示,农民市场的多样性比超市更高. 鉴定了像光细菌和青菌这样的关键细菌,在销售过程中存在潜在的交叉污染风险.
科学领域:
- 食品微生物学 食品微生物学
- 微生物生态学 微生物生态学
- 食品安全科学 食品安全科学
背景情况:
- 生猪肉中的细菌污染影响了保质期和安全性.
- 了解猪肉的细菌群体对于质量控制至关重要.
- 识别特定的细菌有助于预防食物传播疾病.
研究的目的:
- 分析和比较超市和农贸市场生猪肉中的细菌群体.
- 确定主导的细菌属及其与猪肉质量和安全的关联.
- 调查猪肉销售过程中的潜在交叉污染.
主要方法:
- 从中国青岛的超市和农贸市场收集了52个生猪肉样本.
- 利用16S核糖体DNA (rDNA) 的高通量测序进行细菌群体分析.
- 应用多样性指数 (alpha和beta) 和线性差异分析效果大小 (LEfSe) 用于统计分析.
主要成果:
- 与超市样本相比,来自农民市场的猪肉表现出更高的α和β多样性.
- 蛋白质细菌是占主导地位的类;光细菌和Acinetobacter是最丰富的属.
- 光细菌被确定为超市猪肉的生物标志物,尽管其总体丰度低于农民市场样本.
- 来自同一地点的样本之间的强烈相关性表明了交叉污染.
结论:
- 在超市和农民市场销售的猪肉之间,细菌社区结构不同.
- 光细菌和Acinetobacter是生猪肉中的关键细菌,影响质量和安全性.
- 调查结果强调需要在猪肉销售中改进微生物控制策略,以减轻污染风险.
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