临床表征,分子和基因组测序分析SARS-Cov-2在第二波期间在印度查蒂斯加尔邦的莱加尔
Anubha Patel1, Anuniti Mathias2, Ashish Baghel3
1Department of Microbiology, Government Medical College, Mahasamund, Chhattisgarh, India.
Bioinformation
|February 7, 2025
概括
在印度的第二次COVID-19浪潮中,Delta变种 (B.1.617.2) 主导,Envelope (E) 基因和RNA依赖RNA聚合酶 (RdRp) 的突变很常见. 大多数突破性感染呈现轻度至中度临床严重程度.
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:
- 严重急性呼吸道综合征冠状病毒-2 (SARS-CoV-2) 持续演变,需要持续监测.
- 了解不同波段的病毒特征对于公共卫生至关重要.
- 印度的第二次COVID-19浪潮呈现了一个独特的流行病学背景.
研究的目的:
- 在印度查蒂斯加尔邦莱加尔区的第二波疫情期间评估SARS-CoV-2的临床特征,分子分析和基因组测序.
- 为了识别流行的SARS-CoV-2令人担忧的变种 (VOCs) 和其他突变.
- 在突破性感染中,将基因组发现与临床严重程度相关联.
主要方法:
- 对13,402个COVID-19突破病例的分析.
- 从SARS-CoV-2阳性患者中采集鼻/耳抽样.
- 下一代测序 (NGS) 用于基因组分析和核酸变化的识别.
- 实时RT-PCR用于初始诊断.
主要成果:
- 德尔塔 (B.1.617.2) 变种是最频繁检测到的VOC.
- AY.4和AY.12是发现的最常见的非VOC变种.
- 经常观察到包裹 (E) 基因和依赖RNA的RNA聚合酶 (RdRp) 的突变.
- 47.05%的突变变异型患者的临床严重程度为轻度,而52.94%的临床严重程度为中度.
结论:
- 在第二次COVID-19浪潮期间的基因组监测揭示了三角洲变种和特定非VOC血统的主导地位.
- 在E基因和RdRp中发现了常见的突变.
- 突破性感染主要与轻度至中度的临床结果有关.
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