2019-2020年巴西萨比亚病毒的基因组表征:对诊断,病毒进化和受体结合的影响
Ingra M Claro1,2,3,4, Erika R Manuli1,2,5, Camila A M da Silva1,2
1Departamento de Moléstias Infecciosas e Parasitárias, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.
PLoS neglected tropical diseases
|February 20, 2026
概括
萨比亚病毒 (SABV) 是一种竞技病毒,在两个巴西患者中引起了致命的出血和神经疾病,最初怀疑是黄热病. 遗传分析表明,SABV在巴西已经传播了100多年,不被发现,需要加强监测.
科学领域:
- 病毒学 病毒学
- 传染性疾病 传染性疾病
- 公共卫生 公共卫生
背景情况:
- 严重的出血和神经疾病可能会被误认为黄热病.
- 萨比亚病毒 (SABV) 是一种罕见的新世界领域病毒,人类感染记录有限,所有致命且与农村环境相关.
- 现有的诊断方法在巴西圣保罗的两个致命病例中未能识别SABV.
研究的目的:
- 在最初怀疑患有黄热病的两名患者中,确定严重,致命的发烧性疾病的致病因.
- 描述已识别的萨比亚病毒菌株的遗传多样性和进化史.
- 调查巴西SABV在巴西广泛,未被发现的传播的可能性.
主要方法:
- 使用下一代测序,从患者样本中获得完整或近乎完整的病毒基因组.
- 开发用于SABV检测的新型分子诊断试验.
- 遗传学分析和同源模型被用来研究病毒遗传多样性,进化关系和受体结合性质.
主要成果:
- 萨比亚病毒 (SABV) 被确定为两例致命病例的致病原体,这些病例呈现出急性出血综合征和神经系统变化.
- 新发现的SABV菌株 (SP17和SP19) 与基准菌株呈现遗传多样性,在NP水平上具有93-98.2%的氨基酸相同性.
- 遗传学分析表明,这两起病例在流行病学上没有联系,并暗示了超过一个世纪以来在巴西未被发现的SABV循环.
结论:
- 沙巴病毒对公众健康构成重大威胁,能够引起严重的致命疾病,可能被误诊.
- 这些发现强调了需要改善诊断能力和加强对巴西未被诊断出血热病例的监测.
- 需要进一步的研究,以了解巴西SABV的流行病学和公共卫生影响.
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