发生,分子特征和耐受性的Cronobacter spp. 从中国的发酵玉米产品中分离出来
1Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, 150030, China.
Food microbiology
|February 14, 2025
概括
在中国发酵玉米产品中发现了克罗诺细菌细菌. 某些菌株对压力和生物膜形成的耐受性增加,突出了与植物性食品相关的风险.
科学领域:
- 食品微生物学 食品微生物学
- 细菌病原发生的细菌.
- 食品安全 食品安全
背景情况:
- 克罗诺巴克特 spp. 的种类. 是经常在植物性食品中发现的机会性病原体.
- 发酵玉米产品 (FCP) 在中国很常见,可以成为病原体传播的载体.
研究的目的:
- 调查中国FCP中Cronobacter的发生,分子特征和耐压力.
- 评估通过这些食品传播Cronobacter的风险.
主要方法:
- 从216个FCP样本中分离和识别了Cronobacter.
- 使用多位置序列类型 (MLST),ompA基因型和血清型的分子特征.
- 对酸性,透性和寒冷应激的耐受性和生物膜形成的评估.
- 抗微生物敏感性测试.
主要成果:
- 他们分离了22种克罗诺细菌菌株 (20种C. sakazakii,2种C. muytjensii).
- 确定了8种序列类型 (ST),4种血清型和4种 ompA 基因型.
- ST770菌株对酸性,透性和寒冷压力的耐受性更高,生物膜形成更强.
- 大多数隔离物对常见的抗生素敏感,但77.27%对cefotaxime有耐药性.
结论:
- 克罗诺细菌可以通过中国的发酵玉米产品传播.
- 特定的Cronobacter菌株具有增强的应力耐受性和生物膜形成能力.
- 这些发现为控制FCP中的Cronobacter和减轻食源性疾病风险提供了基础.
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