评估在使用改装后的洗衣机时,绿叶蔬菜可能受到李斯特菌的污染
Pragathi Kamarasu1, Lynne McLandsborough1, Matthew D Moore2
1Department of Food Science, University of Massachusetts Amherst, Amherst, MA, USA.
NPJ science of food
|July 5, 2025
概括
小叶绿种植者在使用改装后的洗衣机干燥时,可能会受到李斯特菌的交叉污染. 这项研究发现,Listeria innocua在机器表面有显著的恢复,并转移到菜上,突出了食品安全方面的担忧.
科学领域:
- 食品安全 食品安全
- 微生物学 微生物学
- 农业工程 农业工程
背景情况:
- 绿叶蔬菜经常与食源性疫情有关,通常是由于Listeria monocytogenes等病原体引起的.
- 小型和中型种植者通常将洗衣机调整为使用旋转周期干燥绿叶蔬菜.
研究的目的:
- 为了研究微生物交叉污染的潜力,在后装的洗衣机中旋转干燥的绿叶蔬菜.
- 评估利斯特菌从机器表面和装载篮子转移到生产的风险.
主要方法:
- 无垢菌被注射在菜上,洗净,然后在装修后的洗衣机中干燥.
- 机器的接触面在干燥后被采样,以量化微生物回收.
- 评估了从受污染的装载篮中将Listeria innocua转移到未接种的菜中.
主要成果:
- 在机器接触面上观察到高回收率 (98-99%) 的无垢菌,特别是在收集水的区域.
- 无菌菌从受污染的装载篮转移到干净的菜中,回收率为10^1-10^2 CFU/g.
- 在改装后的机器中,旋干过程对Listeria交叉污染构成重大风险.
结论:
- 在改装后的洗衣机中旋干燥绿叶蔬菜的做法可能会导致大量的微生物污染.
- 这种方法存在潜在的食品安全危险,增加了Listeria在产品中传播的风险.
- 种植者应重新评估干燥方法,以减轻交叉污染风险并确保产品安全.
相关概念视频
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