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生物标本储存作为一个时间囊来探索诺罗病毒流行病学的时间动态

Floriana Bonura¹, Chiara Filizzolo¹, Mariangela Pizzo¹

¹Dipartimento di Scienze per la Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", Università di Palermo, Via del Vespro 133, 90127 Palermo, Italy.

|December 23, 2023

概括

这项为期35年的研究追踪了意大利的诺罗病毒 (胃肠炎的原因). 它发现诺罗病毒迅速改变其基因构成,强调需要对疫苗开发进行持续监测.

科学领域:

病毒学病毒学
流行病学流行病学
公共卫生公共卫生

背景情况:

诺罗病毒是全球急性胃肠炎 (AGE) 的首要原因.
在分子分析的广泛使用之前,关于诺罗病毒遗传多样性的数据有限.
长期监测为病毒演变和流行病学提供了洞察力.

研究的目的:

分析在35岁以上的患有AGE的住院儿童中循环的诺罗病毒的遗传多样性和时间动态.
研究诺罗病毒基因组GI和GII的进化模式,专注于囊体 (Cap) 和聚合酶 (Pol) 基因.
评估诺罗病毒遗传变化的对公共卫生和疫苗设计的影响.

主要方法:

在1986年至2020年间在意大利帕勒莫从患有AGE的住院儿童收集的8433个便样本的回顾性分析.
使用实时RT-PCR检测和基因定型诺罗病毒.
对诺罗病毒体 (Cap) 和聚合酶 (Pol) 基因的时间趋势和遗传变异的分析.

主要成果:

基因组II (GII) 的诺病毒在15.6%的病例中被检测出来,而基因组I (GI) 则在1.4%中被发现.
主流的诺罗病毒囊基因型是GII.4 (60.8%),其次是GII.3 (13.3%) 和GII.2 (12.4%).
观察到GII.4体变体的时间替代和各种GII.3和GII.2血统/菌株的循环.

结论:

诺罗病毒表现出连续和快速的基因组进化,在主导基因型和变异中出现显著的时间变化.
长期监测对于了解诺罗病毒流行病学和为有效疫苗设计提供信息至关重要.
该研究强调了诺罗病毒演变的动态性质及其对公共卫生干预措施的影响.

关键词:

GII.2 这是一个很好的例子.在 GII.3 中,GII.GII.4.4 这是一个很好的例子.意大利意大利意大利意大利进化进化演化演化演化演化基因型基因型基因型诺罗病毒诺罗病毒

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