在名古屋从与食品相关的标本中分离的白菌的回顾性分析
Takashi Ichikawa1, Yohei Kobayashi1, Katsuaki Masuno1
1Department of Microbiology, Nagoya City Public Health Research Institute, Japan.
Japanese journal of infectious diseases
|August 31, 2025
概括
自20世纪80年代以来,S. aureus不同的一种葡萄球菌 (Staphylococcus argenteus) 已经存在于食品环境中. 基因分析发现多种菌株,强调需要对这种细菌进行持续监测.
科学领域:
- 微生物学
- 细菌学
- 食品安全问题
背景情况:
- 在2015年被确定为新物种的Staphylococcus argenteus与金黄色葡萄球菌不同.
- 历史上的S. argenteus的流行和分布,特别是在食物环境中,仍然在很大程度上没有特征.
研究的目的:
- 在与食品相关的环境中调查Staphylococcus argenteus的历史存在和遗传多样性
- 确定从1986年到2022年在名古屋市传播S. argenteus的时间表.
主要方法:
- 从1986年至2022年收集的食品样本中重新检查了1,021个葡萄球菌分离物.
- 使用MALDI-TOFMS进行识别,并通过多位序列类型 (MLST) 进行确认.
主要成果:
- 65个分离物 (6.4%) 被确定为S. argenteus,最早的检测是在1986年.
- ST2854是最常见的序列类型;自20世纪90年代以来,已检测到临床相关的ST1223和ST2250.
- 自20世纪80年代以来,在食品环境中出现了基因多样化的S. argenteus菌株,包括新的序列类型.
结论:
- 在上世纪80年代,阿根廷葡萄球菌在名古屋市的食品相关环境中传播.
- 近年来,MALDI-TOF MS的改进提高了S. argenteus的识别能力.
- 由于长期存在多种S. argenteus菌株,因此需要在食品环境中持续监测.
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