在Ndola,赞比亚的第二波期间,无症状个体中出现了COVID-19阳性病例
Jonathan Gwasupika1, Victor Daka2, Justin Chileshe3
1Department of Clinical Sciences, Tropical Diseases Research Centre, Ndola, Zambia.
African journal of laboratory medicine
|June 9, 2023
概括
在赞比亚的一项研究发现,在为旅行测试的无症状个体中,COVID-19阳性率为16.0%. 这一高率表明正在进行的社区传播,并支持增加针对严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 的测试.
科学领域:
- 公共卫生 公共卫生
- 传染性疾病 传染性疾病
- 流行病学 流行病学
背景情况:
- 冠状病毒疾病2019 (COVID-19) 构成了全球卫生挑战,其中很大一部分病例无症状.
- 了解无症状个体的阳性率对于控制疾病传播至关重要,但只有不到20%的研究解决了这一问题.
- 无症状的个体可以为社区传播做出贡献,强调需要调查他们的感染率.
研究的目的:
- 在赞比亚的第二波大流行期间,确定无症状个体中的COVID-19阳性率.
- 在无症状旅行者中分析严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 感染的流行病学趋势.
主要方法:
- 通过使用从2020年12月到2021年3月的例行监测和实验室数据进行了一项回顾性横截面研究.
- 数据来自于在赞比亚恩多拉的一个主要测试中心对SARS-CoV-2进行测试的无症状个体,主要用于旅行目的.
- 流行病学曲线和频率分布被用来分析COVID-19病例数据和人口比例.
主要成果:
- 在11144名无症状患者中,有1781人 (16.0%) 呈阳性SARS-CoV-2检测结果.
- 阳性率在2021年1月达到峰值 (37.4%),并在2021年3月显示下降趋势 (21.0%).
- 流行病学曲线表明连续和传播的点源传播模式的混合.
结论:
- 无症状个体中16.0%的阳性率特别高,这表明COVID-19的社区传播持续存在.
- 这些发现强调了持续和加强SARS-CoV-2测试的重要性,特别是在无症状人群中.
- 这项研究为开发基于证据的干预措施提供了关键的见解,用于旅行者查和管理社区感染.
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