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Updated: Jan 17, 2026

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基因组多样性和与表面水中的Listeria monocytogenes存在相关的环境因素

Magaly Toro¹, Daniel Weller², Camila Solar³

¹Joint Institute for Food Safety and Applied Nutrition/Center for Food Safety & Security Systems, University of Maryland, College Park, MD, 20740, USA.

The Science of the total environment

|September 18, 2025

概括

在智利的灌水中检测到Listeria monocytogenes,其流行率因地点和季节而异. 基因分析揭示了多样化的菌株,其中一些具有毒性和耐药性基因,突出显示了环境持久性风险.

科学领域:

环境微生物学环境微生物学
食品安全食品安全
公共卫生公共卫生

背景情况:

李斯特菌 (Listeria monocytogenes) 构成一个重要的食物传播疾病风险.
灌水是传染病原体向作物传播的潜在载体.
了解L. monocytogenes在水中的流行程度对于降低风险至关重要.

研究的目的:

在智利灌水中检测和描述L. monocytogenes.
评估与L. monocytogenes污染相关的流行率,遗传多样性和风险因素.
为减少食源性疾病风险的战略提供信息.

主要方法:

在一年内,每月从智利四个流域的120个地点收集1050个水样.
检测和对L. monocytogenes分离物的遗传特征.
影响病原体存在的环境因素 (水类,月份,流域,pH,季节) 的分析.

主要成果:

L. monocytogenes 的流行率在流域中从15%到25%不等,受水类型,季节和pH的影响.
基因分析确定了跨地区和时间的克隆分离物,主要是血清组IVb.
病毒性基因 (LIPI1) 是常见的;抗菌素耐药性基因 (mefA, msrD) 是罕见的.
在L. monocytogenes和沙门氏菌存在之间没有发现任何关联.

结论:

智利的淡水环境拥有基因多样性的L. monocytogenes菌株.
环境持久性和水库可能解释了菌株的传播.
需要改进监测和控制策略,以减轻与污染灌水相关的公共卫生风险.

关键词:

环境因素环境因素李斯特里亚单细胞原生菌 (Listeria monocytogenes) 是一种水的污染污染水的污染整个基因组序列的测序

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