圣保罗:疫情,流行病学和基因组结构
Pedro Panzenhagen1,2,3,4, Devendra H Shah5, Dalia Dos Prazeres Rodrigues2
1Center for Food Analysis (NAL), Technological Development Support Laboratory (LADETEC), Federal University of Rio de Janeiro (UFRJ), Cidade Universitária, Rio de Janeiro 21941-598, RJ, Brazil.
Genes
|March 28, 2025
概括
沙门氏菌圣保罗 (SSa) 呈现出全球传播和多样化的演变,在南美普遍存在ST-50等特定菌株. 了解其基因组和致病特征对于公共卫生监测至关重要.
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:
- 沙门氏菌圣保罗 (SSa) 在全球食品传播疫情中越来越令人担忧.
- 对SSa流行病学,基因组多样性和致病性的有限理解妨碍了有效的控制.
- 这项研究调查了SAS人口动态,遗传构成和毒性.
研究的目的:
- 综合分析全球人口动态和沙门氏菌的爆发模式.
- 描述SSa菌株的基因组多样性和病原性潜力,包括巴西的分离物 (PP_BR059).
- 确定与SAS病毒性和抗菌素耐药性相关的遗传因素.
主要方法:
- 分析了1953个公开可用的SSa基因组,使用核心基因组多位置序列类型化 (cgMLST) 和遗传学推断.
- 抗微生物耐药性 (AMR) 分析,泛基因组分析和全基因组关联研究 (GWAS).
- 在体外巨细胞感染测定和全基因组测序 (WGS) 菌株PP_BR059.
主要成果:
- 遗传学分析揭示了49种序列类型 (ST),其中ST-50和ST-27是最常见的. 包括PP_BR059在内的ST-50菌株在南美普遍存在.
- 60%的SAS基因组具有泛敏感性;ST-27呈现出最高的AMR流行率.
- PP_BR059在巨细胞中显示出侵袭性降低,但增强了细胞内生存率,具有泛敏感性概况并且没有等离子体.
结论:
- 沙门氏菌 Saintpaul 呈现出显著的全球传播,多样化的进化轨迹和可变的致病性.
- 分子监测对于跟踪SSa的演变和为公共卫生战略提供信息至关重要.
- 对SSa菌株的基因组和表型鉴定对于理解和减轻食源性疾病风险至关重要.
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