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来自毛里求斯的流感A病毒的分子进化,2017-2019年

Magalutcheemee Ramuth^1,2, Janaki Sonoo¹, Fhooblall Mokshanand¹

¹Central Health Laboratory, Victoria Hospital, Ministry of Health & Wellness, Quatre-Bornes, Plaine-Wilhems, Mauritius.

Influenza and other respiratory viruses

|May 13, 2025

概括

流感A型病毒,特别是A/H1N1pdm09和A/H3N2,在毛里求斯持续演变. 这种遗传多样性强调了持续基因组监测的必要性,以指导该地区有效的疫苗接种和流行病准备战略.

科学领域:

病毒学病毒学
基因组学就是基因组学.
流行病学流行病学

背景情况:

流感仍然是非洲国家的重大公共卫生负担,尽管可以通过疫苗预防.
毛里求斯全年都经历流感活动,但缺乏针对疫苗接种和流行病规划的可靠数据.
这项研究解决了在毛里求斯传播流感A病毒的遗传特征的需求.

研究的目的:

描述2017年至2019年在毛里求斯检测到的A型流感病毒 (IAV) 菌株的遗传多样性.
提供数据,以告知与流感疫苗接种和该地区的流行病准备相关的公共卫生战略.

主要方法:

使用牛津纳米孔技术对流感A/H1N1pdm09和A/H3N2分离物的测序.
生物信息分析包括组装 (CZ ID,基因组侦探),基因分析 (Nextclade,MEGA XI) 和氨基酸替代比较.
使用NetNGlyc 1.0.0.c 预测潜在的N链接糖化位点.

主要成果:

A型流感病毒占主导地位 (92.6%),其中A/H1N1pdm09 (62.5%) 和A/H3N2 (2017年为55.9%) 是主要的亚型.
遗传学分析显示,A/H1N1pdm09的6B类主导地位与与抗原变化相关的替代,以及A/H3N2的显著遗传多样性,包括3C.2a4和3C.2a1b.1类,表明抗原漂移.
在A/H3N2病毒的HA和NA中观察到N相关的糖化位点的丧失.

结论:

在毛里求斯,A/H1N1pdm09和A/H3N2病毒的持续遗传进化需要持续的基因组监测.
基因组数据对于优化流感疫苗成分和抗病毒策略至关重要.
这些发现有助于理解非洲和全球的流感病毒生态.

关键词:

Ct周期的值值.GISAID 全球倡议共享所有流感数据 HA 血液凝聚素血液凝聚素 ILI 流感是一种类似疾病的疾病.NA NA 神经氨基酶酶 NGlyc N-链接的糖基化.在PCR聚合酶链反应过程中,PCR聚合酶链反应发生.SARI 严重急性呼吸道疾病

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