美国密苏里州的农村人口促进了SARS-CoV-2的早期演变和传播
Cynthia Y Tang1,2,3,4,5, Tao Li6,5, Tricia A Haynes1,2,3
1Center for Influenza and Emerging Infectious Diseases, University of Missouri, Columbia, MO, USA.
Npj viruses
|January 8, 2024
概括
农村社区在SARS-CoV-2的演变和传播中发挥着关键作用,这是导致COVID-19的病毒. 加强这些地区的监测对于有效控制流行病至关重要.
科学领域:
- 流行病学 流行病学
- 病毒学 病毒学
- 基因组学就是基因组学.
背景情况:
- 美国的农村人口面临着严重的COVID-19负担,但SARS-CoV-2的监测却偏向于城市.
- 了解农村SARS-CoV-2变种的作用对于疫情应对至关重要.
研究的目的:
- 调查农村社区在早期大流行期间对SARS-CoV-2演变和传播的贡献.
- 分析农村和城市COVID-19病例的基因组数据.
主要方法:
- 从密苏里州西南部的未接种疫苗的个人收集了979个呼吸器标本 (544个城市,435个农村).
- 进行了基因组和植物动力学分析,以确定SARS-CoV-2 Pango血统并追踪传播模式.
- 研究了农村与城市环境中的特定病毒蛋白替代和选择压力.
主要成果:
- 确定了53个SARS-CoV-2 Pango血统,其中14个仅在农村样本中发现.
- 农村和城市地区之间经常出现双向传播.
- 密苏里州7个农村血统中的4个在全球传播.
- 核体蛋白替代 (N:R203K/G204R) 在城市序列中更常见,而在农村样本中检测到N:204的阳性选择.
结论:
- 农村社区是SARS-CoV-2进化和传播的重要来源.
- 在农村和城市环境中可能存在不同的选择压力.
- 扩大对农村人口的监测和资源对于缓解COVID-19是必不可少的.
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