2022年の北京におけるSARS-CoV-2変種の特徴:流行病学的および系統学的分析
Yang Pan1, Liang Wang2, Zhaomin Feng1
1Beijing Center for Disease Prevention and Control, Beijing, China.
Lancet (London, England)
|February 11, 2023
まとめ
北京
科学分野:
- ウイルス学
- ゲノミクス
- 流行病学
背景:
- 中国のダイナミックなゼロCOVID戦略は,2022年12月までに北京における局所的なSARS-CoV-2感染を制限した.
- 頻繁に輸入された症例と最近のCOVID-19の急増は,新しいSARS-CoV-2変種に関する懸念を引き起こしました.
- 北京での日常的なウイルスゲノム監視は,世界的なパンデミック対策に不可欠です.
研究 の 目的:
- 北京からのSARS-CoV-2ゲノム配列を分析する.
- 増加するCOVID-19症例のなかでの新しい変種の出現を調査する.
- 循環する菌株の 空間時間的な動態を理解するために
主な方法:
- 北京で (2022年1月~12月) 輸入および現地症例から採取した呼吸器サンプル.
- SARS-CoV-2 ゲノム生成のための次世代のシーケンシングを使用した.
- 高品質の完全な配列を基因系と集団動態分析した.
主要な成果:
- 2994個の完全なSARS-CoV-2ゲノム (2881個の高品質) を生成した.
- 地元の350例と輸入された63例を含む413件の新しいサンプル (2022年11月14日-12月20日) をシーケンスしました.
- BA.5.2とBF.7が支配的な株 (局所症例の90%) として特定され,2022年11月14日から有効な集団サイズが増加した. 新しい系統は検出されていません.
結論:
- BF.7とBA.5.2は2022年11月14日以降,北京での流行に共存しており,新しい変種の証拠はありません.
- 北京のデータは 人口交換による中国の状況のスナップショットです
- 流通する菌株の高い伝染性は,継続的なモニタリングを正当化します.
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