在巴西东南部的一个城市,SARS-CoV-2血统特定的疾病症状和疾病严重程度
Flavia Cristina da Silva Sales1,2, Carlos Augusto Prete Junior3,4,5, Leandro Abade6
1Universidade de São Paulo, Faculdade de Medicina, Instituto de Medicina Tropical de São Paulo, São Paulo, São Paulo, Brazil.
Revista do Instituto de Medicina Tropical de Sao Paulo
|February 4, 2026
概括
关注的玛变种在巴西显著增加了COVID-19的严重程度和呼吸障碍等症状. 较贫穷的地区的病例发生率更高,突出了疾病影响的差异.
科学领域:
- 流行病学 流行病学
- 病毒学 病毒学
- 公共卫生 公共卫生
背景情况:
- 2020年,巴西南方州圣凯塔诺推出了一个用于COVID-19初级保健的数字平台.
- 该平台整合了疑似病例的临床,人口和样本数据.
- 研究期间 (2020年4月至2021年4月) 与玛变种的出现相吻合.
研究的目的:
- 分析COVID-19感染的特定血统的时空动态.
- 调查与不同SARS-CoV-2血统相关的临床症状和疾病严重程度.
- 了解巴西的玛变种在流行病学上的影响.
主要方法:
- 从城市的平台收集临床,人口,空间和流行病学数据.
- 测序了879个PCR阳性样本,确保了空间和时间的代表性.
- 使用移动窗口方法和分析的症状概率估计的谱系特异性流行率.
主要成果:
- B.1.1.28 (41.3%) 是最常见的血统,其次是Gamma (31.7%),Zeta (9.6%) 和B1.1.33 (9.0%).
- 玛和泽塔变种与呼吸障碍增加和持续发烧有关.
- 玛感染显示老年症,厌氧症和冠状炎的发病率有所降低,但Zeta与精神状态的改变有关.
结论:
- 玛变种与更严重的COVID-19病例相关,导致巴西死亡率增加.
- SARS-CoV-2 血统动态影响了症状概况和疾病严重程度.
- 病例发生率在空间上有所不同,不成比例地影响较贫穷和较年轻的地区.
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