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Updated: May 21, 2025

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对子适应型沙门氏菌进行基因组和表型调查

Zining Wang^1,2,3,4, Zenghai Jiang⁵, Qianzhe Cao²

¹Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China.

|March 17, 2025

概括

子中的沙门氏菌 Typhimurium 爆发与可能来自美国的特定克隆有关. 适应的菌株表现出独特的特征,影响家禽产业的生物安全.

科学领域:

兽医微生物学兽医微生物学
禽畜科学禽畜科学禽畜科学
食品安全食品安全

背景情况:

沙门氏菌对公众健康构成重大风险,并在家禽部门造成经济损失.
养殖场独特的繁殖模式增加了对沙门氏菌感染和寄生虫病爆发的易感性.
在最近的爆发期间,已经确定了明显的沙门氏菌Typhimurium (STM) 克隆.

研究的目的:

为了调查导致子偏型病毒的沙门氏菌Typhimurium菌株的遗传多样性和起源.
分析特定于子的STM菌株的毒性,入侵能力和宿主适应性.
为了评估沙门氏菌通过子传播到其他大陆的风险.

主要方法:

全基因组测序 (WGS) 和53种来自子的STM菌株的抗菌素耐药性概况.
在体外和体内细菌毒性和入侵测定.
全球遗传学分析以确定潜在的地理起源.

主要成果:

确定了三种不同的STM克隆 (ST128-DT2,ST19-DT99),美国是潜在的来源.
与宿主适应性STM菌株表现出减少的抗性基因,更高的入侵指数和强大的生物膜形成.
这些适应菌株在小鼠中显示出减少的毒性,但在子中显示出特定的适应性.

结论:

这项研究支持沙门氏菌Typhimurium DT2和DT99菌种对子的宿主适应.
这些发现凸显了通过子贸易传染洲际沙门氏菌的风险.
了解这些适应对于改善子养殖和家禽产业的生物安全至关重要.

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