在美国的牛和人类Salmonella都柏林的基因组进化
Sophia M Kenney1,2,3, Nkuchia M M'ikanatha4,5, Erika Ganda1,3
1Department of Animal Science, The Pennsylvania State University, University Park, Pennsylvania, USA.
Applied and environmental microbiology
|August 19, 2025
概括
抗微生物药物耐药的沙门氏菌都柏林构成了重大威胁,需要一种"健康"的方法. 基因组分析揭示了美国菌株之间的高度相关性,强调了交叉传播风险和综合监测的必要性.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 流行病学 流行病学
背景情况:
- 抗微生物药物耐药性 (AMR) *沙门氏菌*都柏林对人类和动物健康的威胁日益增加.
- 传播的 * S * . 美国食品供应链中的都柏林问题引发了食品安全和保障的担忧.
- 一个健康的方法对于理解病原体进化和控制AMR至关重要.
研究的目的:
- 分析AMR*S*的演变情况. 迪布林跨越美国的人类,动物和环境水库.
- 阐明导致*S*中AMR出现的因素. 在都柏林,都柏林.
- 通过了解AMR传播动态,为公共卫生干预提供信息.
主要方法:
- 2,150个*S*的基因组测序. 来自临床牛,临床人类和环境来源的都柏林菌株 (2002-2023年).
- 全基因组测序,de novo组装,基因组注释,以及等离子体和耐药基因的表征.
- 使用核心基因组SNP进行遗传学分析,以评估菌株的相关性和遗传多样性.
主要成果:
- IncA/C2等离子体和特定的AMR基因在牛菌株中最为普遍,这些牛菌株也表现出更大的遗传多样性.
- 尽管存在源特异性AMR特征的差异,但72%的菌株的差异为≤20个SNP,这表明基因组相似性很高.
- 在人类,动物和环境水库中观察到显著的遗传关系.
结论:
- 美国*S*的高基因组相似性. "都柏林菌株"强调了水库之间潜在的交叉传播.
- 了解源特定的AMR概况对于有效的监测和控制策略至关重要.
- 一个健康的框架对于对抗动物传染性AMR病原体,如*沙门氏菌*都柏林,至关重要.
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