在2023年至2024年期间,巴西的Oropouche病毒再次出现
Gabriel C Scachetti1, Julia Forato1, Ingra M Claro2
1Laboratory of Emerging Viruses, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil.
medRxiv : the preprint server for health sciences
|August 12, 2024
概括
一种新型的Oropouche病毒 (OROV) 重组剂导致了巴西的一次重大Oropouche热病爆发. 这种新的OROV菌株表现出增强的复制和免疫逃避能力,有助于其快速传播.
科学领域:
- 病毒学 病毒学
- 流行病学 流行病学
- 免疫学 免疫学 免疫学
背景情况:
- 口腔疹病毒 (OROV) 在中美洲和南美洲引起口腔疹热的爆发.
- 该病毒已在巴西重新出现,在2023年至2024年之间发生了重大疫情.
研究的目的:
- 调查巴西奥罗普什热病复发背后的病毒学因素.
- 描述最近爆发的OROV菌株的基因组,分子和血清学特性.
主要方法:
- 来自巴西 (2015-2024) 的综合基因组,分子,血清学和流行病学数据.
- 进行了发烧患者的分子查和OROV菌株的基因组测序.
- 进行了体外和体内表征,包括对原型和流行病菌株进行中和抗体测试.
主要成果:
- 在2023年12月至2024年5月期间,在亚马逊地区10.8%的发烧患者中检测到OROVRNA.
- 确定了一种新型的OROV重组剂,它是2023-2024年流行病的原因,在哺乳动物细胞中复制率高出100倍.
- 与原型相比,抗体对重组菌株的中和能力有所降低.
结论:
- 巴西2023-2024年Oropouche热病爆发是由一种新型,高度复制性的OROV复杂物驱动的.
- 这种重新组合的病毒可能会逃避先前存在的免疫力,从而导致发病率的增加.
- 这些发现有助于更好地理解ORV的重新出现,并为公共卫生战略提供信息.
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